text: Title: Sanic adapter uses deprecated cookie methods
  Body: As of Sanic v23.3 (released in March 2023), the correct way to attach a cookie to a Sanic response is via the [`add_cookie` method](https://sanic.dev/en/release-notes/2023/v23.3.html#more-convenient-methods-for-setting-and-deleting-cookies). The old cookie dict mechanism is set to be removed in a future Sanic release (the warning messages say v24.9, although that was due to be released a couple months ago and wasn't, so it may be any time in the future). In the meantime, Slack Bolt's Sanic adapter generates deprecation warnings when used with current versions of Sanic.
  
  ### Reproducible in:
  
  #### The `slack_bolt` version
  
  slack-bolt==1.21.2
  slack-sdk==3.33.1
  
  #### Python runtime version
  
  Python 3.12.7
  
  #### OS info
  
  ProductName:            macOS
  ProductVersion:         13.7.1
  BuildVersion:           22H221
  Darwin Kernel Version 22.6.0: Thu Sep  5 20:48:48 PDT 2024; root:xnu-8796.141.3.708.1~1/RELEASE_X86_64
  
  #### Steps to reproduce:
  
  1. Create a new Python project with Slack Bolt, Sanic and Pytest dependencies.
  2. Add the following test file to the project:
  
  ```python
  import os
  
  import pytest
  from sanic import Sanic
  from sanic.request import Request as SanicRequest
  from sanic.response import HTTPResponse as SanicHttpResponse
  from slack_bolt.adapter.sanic.async_handler import AsyncSlackRequestHandler as SanicRequestHandler
  from slack_bolt.async_app import AsyncApp as AsyncBoltApp
  
  
  _SANIC_APP = Sanic("standup-for-me")
  _BOLT_APP = AsyncBoltApp(
      token=os.environ.get("SLACK_BOT_TOKEN"),
      signing_secret=os.environ.get("SLACK_SIGNING_SECRET"),
  )
  
  _SLACK_REQUEST_HANDLER = SanicRequestHandler(_BOLT_APP)
  
  
  @_SANIC_APP.get("/slack/install")
  async def handle_slack_install(request: SanicRequest) -> SanicHttpResponse:
      return await _SLACK_REQUEST_HANDLER.handle(request)
  
  
  class TestSanicApp:
      @pytest.mark.asyncio
      async def test_sanic(self) -> None:
          _, response = await _SANIC_APP.asgi_client.get("/slack/install")
  
          assert response.status == 200
  ```
  
  3. Run the test from the CLI using pytest.
  4. Note the warnings in the test output.
  
  ### Expected result:
  
  Slack Bolt should use the `add_cookie` method when generating a Sanic response object. As a result, there should be no cookie warnings from Sanic.
  
  ### Actual result:
  
  The following warnings are logged to stdout:
  
  ```
  /path/to/project/.venv/lib/python3.12/site-packages/sanic/logging/deprecation.py:33: DeprecationWarning: [DEPRECATION] Setting cookie values using the dict pattern has been deprecated. You should instead use the cookies.add_cookie method. To learn more, please see: https://sanic.dev/en/guide/release-notes/v23.3.html#response-cookies
  
  /path/to/project/.venv/lib/python3.12/site-packages/sanic/logging/deprecation.py:33: DeprecationWarning: [DEPRECATION] Accessing cookies from the CookieJar by dict key is deprecated. You should instead use the cookies.get_cookie method. To learn more, please see: https://sanic.dev/en/guide/release-notes/v23.3.html#response-cookies
  
  /path/to/project/.venv/lib/python3.12/site-packages/sanic/logging/deprecation.py:33: DeprecationWarning: [DEPRECATION v24.9] Setting values on a Cookie object as a dict has been deprecated. This feature will be removed in v24.9. You should instead set values on cookies as object properties: cookie.path=... 
  
  /path/to/project/.venv/lib/python3.12/site-packages/sanic/logging/deprecation.py:33: DeprecationWarning: [DEPRECATION v24.9] Setting values on a Cookie object as a dict has been deprecated. This feature will be removed in v24.9. You should instead set values on cookies as object properties: cookie.domain=... 
  
  /path/to/project/.venv/lib/python3.12/site-packages/sanic/logging/deprecation.py:33: DeprecationWarning: [DEPRECATION v24.9] Setting values on a Cookie object as a dict has been deprecated. This feature will be removed in v24.9. You should instead set values on cookies as object properties: cookie.max-age=... 
  
  /path/to/project/.venv/lib/python3.12/site-packages/sanic/logging/deprecation.py:33: DeprecationWarning: [DEPRECATION v24.9] Setting values on a Cookie object as a dict has been deprecated. This feature will be removed in v24.9. You should instead set values on cookies as object properties: cookie.secure=... 
  
  /path/to/project/.venv/lib/python3.12/site-packages/sanic/logging/deprecation.py:33: DeprecationWarning: [DEPRECATION v24.9] Setting values on a Cookie object as a dict has been deprecated. This feature will be removed in v24.9. You should instead set values on cookies as object properties: cookie.httponly=... 
  
  /path/to/project/.venv/lib/python3.12/site-packages/sanic/logging/deprecation.py:33: DeprecationWarning: [DEPRECATION v24.9] Setting values on a Cookie object as a dict has been deprecated. This feature will be removed in v24.9. You should instead set values on cookies as object properties: cookie.expires=... 
  ```
  
  ## Requirements
  
  Please read the [Contributing guidelines](https://github.com/slackapi/bolt-python/blob/main/.github/contributing.md) (✅) and [Code of Conduct](https://slackhq.github.io/code-of-conduct) (✅) before creating this issue or pull request. By submitting, you are agreeing to those rules. (✅)
  