[TODO] Address suppressed warnings in pytest

[webknjaz]

As for helping out, it'd be nice to have help getting rid of warning suppressions @

cheroot/pytest.ini

Lines 51 to 63 in e87d303

	# FIXME: drop once certifi fixes their use of `importlib.resources`
	# Ref: https://github.com/certifi/python-certifi/issues/183
	ignore:path is deprecated. Use files.. instead. Refer to https.//importlib-resources.readthedocs.io/en/latest/using.html#migrating-from-legacy for migration advice.:DeprecationWarning:certifi.core
	# FIXME: Try to figure out what causes this and ensure that the socket
	# FIXME: gets closed.
	ignore:unclosed <socket.socket fd=:ResourceWarning
	ignore:unclosed <ssl.SSLSocket fd=:ResourceWarning
	# FIXME: Python 3.13 no longer ignores IOBase errors raised by the close(),
	# FIXME: which exposed a possible race condition in test_conn test cleanup.
	# Ref: https://github.com/cherrypy/cheroot/issues/734
	ignore:Exception ignored in. <function IOBase.__del__:pytest.PytestUnraisableExceptionWarning

/

cheroot/cheroot/test/_pytest_plugin.py

Lines 24 to 43 in e87d303

	'ignore:Exception in thread CP Server Thread-:'
	'pytest.PytestUnhandledThreadExceptionWarning:_pytest.threadexception',
	'ignore:Exception in thread Thread-:'
	'pytest.PytestUnhandledThreadExceptionWarning:_pytest.threadexception',
	'ignore:Exception ignored in. '
	'<socket.socket fd=-1, family=AddressFamily.AF_INET, '
	'type=SocketKind.SOCK_STREAM, proto=.:'
	'pytest.PytestUnraisableExceptionWarning:_pytest.unraisableexception',
	'ignore:Exception ignored in. '
	'<socket.socket fd=-1, family=AddressFamily.AF_INET6, '
	'type=SocketKind.SOCK_STREAM, proto=.:'
	'pytest.PytestUnraisableExceptionWarning:_pytest.unraisableexception',
	'ignore:Exception ignored in. '
	'<socket.socket fd=-1, family=AF_INET, '
	'type=SocketKind.SOCK_STREAM, proto=.:'
	'pytest.PytestUnraisableExceptionWarning:_pytest.unraisableexception',
	'ignore:Exception ignored in. '
	'<socket.socket fd=-1, family=AF_INET6, '
	'type=SocketKind.SOCK_STREAM, proto=.:'
	'pytest.PytestUnraisableExceptionWarning:_pytest.unraisableexception',

. While the CI doesn't crash with those in place, they may turn into errors in newer CPython runtimes.

Originally posted by @webknjaz in #754