Investigate code_owner global mapping

[ormsbee]

Ensure this is async-safe:

edx-django-utils/edx_django_utils/monitoring/internal/code_owner/utils.py

Lines 54 to 77 in fe75e97

	_PATH_TO_CODE_OWNER_MAPPINGS = None
	def get_code_owner_mappings():
	"""
	Returns the contents of the CODE_OWNER_MAPPINGS Django Setting, processed
	for efficient lookup by path.
	Returns:
	(dict): dict mapping modules to code owners, or None if there are no
	configured mappings, or an empty dict if there is an error processing
	the setting.
	Example return value::
	{
	'xblock_django': 'team-red',
	'openedx.core.djangoapps.xblock': 'team-red',
	'badges': 'team-blue',
	}
	"""
	global _PATH_TO_CODE_OWNER_MAPPINGS

Alternatively, push forward the DEPR that gets rid of it entirely: #469