Fix pylint warnings for bump to next-pylint

[l0lawrence]

Resolve warnings shown in this PR in order to bump pylint to version 3.2.5

@msyyc if you have time could you take a look?

[msyyc]

lint errors are possibly-used-before-assignment,

• one is about the following code:
  

  autorest.python/packages/autorest.python/test/azure/version-tolerant/Expected/AcceptanceTests/LroVersionTolerant/lroversiontolerant/aio/operations/_operations.py

  Lines 185 to 202 in 6f7abf2

  	if response.status_code not in [200, 204]:
  	try:
  	await response.read() # Load the body in memory and close the socket
  	except (StreamConsumedError, StreamClosedError):
  	pass
  	map_error(status_code=response.status_code, response=response, error_map=error_map)
  	raise HttpResponseError(response=response, error_format=ARMErrorFormat)
  	if response.status_code == 200:
  	deserialized = response.iter_bytes()
  	if response.status_code == 204:
  	deserialized = response.iter_bytes()
  	if cls:
  	return cls(pipeline_response, cast(AsyncIterator[bytes], deserialized), {}) # type: ignore
  	return cast(AsyncIterator[bytes], deserialized) # type: ignore

However, if we look into the logic, the variable deserialized must have value so the error is fake error. Although it is fake error, I think it is not good solution to disable it in pylint configuration file so let me think how to optimize the logic to avoid the fake error report

• one is about

  autorest.python/packages/typespec-python/test/azure/generated/encode-bytes/encode/bytes/_model_base.py

  Lines 566 to 568 in 6f7abf2

  	if exclude_readonly:
  	readonly_props = [p._rest_name for p in self._attr_to_rest_field.values() if _is_readonly(p)]
  	for k, v in self.items():

It is also fake report since readonly_props will not be accessed when exclude_readonly is False. We could assign readonly_props with initial value [] to avoid the pylint error.