text: Title: AsyncResult with exception accumulates traceback every time it is raised
  Body: * gevent version: 22.10.2 from PyPI.
  * Python version: Python 3.11.2
  * Operating System: Fedora 6.2.9-200.fc37.x86_64
  
  ### Description:
  
  Calling get on AsyncResult from multiple greenlets leads to a different traceback in every greenlet. And it can be observed that the tracebacks are getting accumulated despite there being now new tracebacks at all
  
  ```python-traceback
  ERROR:root:something happened
  Traceback (most recent call last):
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
  Exception
  ERROR:root:something happened
  Traceback (most recent call last):
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
  Exception
  ERROR:root:something happened
  Traceback (most recent call last):
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
  Exception
  ERROR:root:something happened
  Traceback (most recent call last):
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
  Exception
  ERROR:root:something happened
  Traceback (most recent call last):
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
    File "/home/krishna/test_gevent", line 11, in <module>
      result.get()
    File "src/gevent/event.py", line 329, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 347, in gevent._gevent_cevent.AsyncResult.get
    File "src/gevent/event.py", line 327, in gevent._gevent_cevent.AsyncResult._raise_exception
    File "/home/krishna/.local/lib/python3.11/site-packages/gevent/_compat.py", line 67, in reraise
      raise value
  Exception
  
  ```
  
  ### What I've run:
  Wrote a simple script to simulate a single AsyncResult with exception getting raised by several greenlets using a for loop for testing purposes
  
  
  ```python
  import logging
  import gevent.event
  
  result = gevent.event.AsyncResult()
  result.set_exception(Exception())
  
  for _ in range(5):
      try:
          result.get()
      except:
          logging.exception("something happened")
  ```
  