text: Title: cpufeature fails to be installed on some non-x86 CPUs
  Body: We use the [cpufeature](https://github.com/robbmcleod/cpufeature) module to detect if a CPU supports AVX512, however, cpufeature fails to be installed on some non-x86 CPUs (e.g., ARMs).
  
  We need to remove this dependency and use code like this to detect if the CPU supports AVX512:
  
  ```python
  def is_fast_bfloat16_supported() -> bool:
      if os.name != "posix" or platform.processor() != "x86_64":
          return False
  
      try:
          eax = _run_x86_assembler(
              b"\xB8\x07\x00\x00\x00"  # mov eax, 7
              b"\xB9\x01\x00\x00\x00"  # mov ecx, 1
              b"\x0f\xa2"  # cpuid
              b"\xC3"  # ret
          )
          avx512_bf16 = bool(eax & (1 << 5))
  
          return amx_bf16 or avx512_bf16
      except:
          logger.warning("Failed to check for the CPU's native bfloat16 support:", exc_info=True)
          return False
  
  
  def _run_x86_assembler(machine_code: bytes) -> int:
      memory = mmap.mmap(
          -1,
          len(machine_code),
          flags=mmap.MAP_PRIVATE | mmap.MAP_ANONYMOUS,
          prot=mmap.PROT_WRITE | mmap.PROT_READ | mmap.PROT_EXEC,
      )
      try:
          memory.write(machine_code)
          address = ctypes.addressof(ctypes.c_int.from_buffer(memory))
          functype = ctypes.CFUNCTYPE(ctypes.c_uint32)
          func = functype(address)
          return func()
      finally:
          memory.close()
  ```
  
  Note that the code above checks for the presence of AVX512_BF16 instruction set, but actually pure AVX512 is enough. This needs to be changed before integrating this code, see https://en.wikichip.org/wiki/x86/avx-512 for the relevant instruction params.
  
  Before merging, it's necessary to test on **(a)** x86-64 CPUs without AVX512, **(b)** x86-64 CPUs with AVX512, **(c)** ARM CPUs (e.g. available on Oracle free-tier cloud or other places).