core: Add ruff rules for Pylint PLC (Convention) and PLE (Errors) (#29286)

See https://docs.astral.sh/ruff/rules/#pylint-pl

libs/core/tests/unit_tests/language_models/chat_models/test_rate_limiting.py

@@ -1,5 +1,4 @@
 import time
-from typing import Optional as Optional
 
 import pytest
 from blockbuster import BlockBuster

libs/core/tests/unit_tests/output_parsers/test_base_parsers.py

@@ -1,7 +1,5 @@
 """Module to test base parser implementations."""
 
-from typing import Optional as Optional
-
 from langchain_core.exceptions import OutputParserException
 from langchain_core.language_models import GenericFakeChatModel
 from langchain_core.messages import AIMessage

libs/core/tests/unit_tests/runnables/test_runnable_events_v1.py

@@ -5,7 +5,6 @@ import sys
 from collections.abc import AsyncIterator, Sequence
 from itertools import cycle
 from typing import Any, cast
-from typing import Optional as Optional
 
 import pytest
 from pydantic import BaseModel