feat: add FeaturesProxy integration for feature flag management in CMS and LMS (#175)

Issue : openedx/edx-platform#37345
Ticket : https://2u-internal.atlassian.net/jira/software/c/projects/BOMS/boards/3017?assignee=712020%3Ad40977e4-f475-4263-b03e-f6b48134372b&selectedIssue=BOMS-200

Author: Akanshu-2u

py_configuration_files/cms.py

@@ -8,6 +8,12 @@
 
 from .production import *  # pylint: disable=wildcard-import, unused-wildcard-import
 
+try:
+    from openedx.core.lib.features_setting_proxy import FeaturesProxy
+    FEATURES = FeaturesProxy(globals())
+except ImportError:
+    pass
+
 # Don't use S3 in devstack, fall back to filesystem
 STORAGES['default']['BACKEND'] = 'django.core.files.storage.FileSystemStorage'
 COURSE_IMPORT_EXPORT_STORAGE = 'django.core.files.storage.FileSystemStorage'

py_configuration_files/lms.py

@@ -15,6 +15,12 @@
 
 from .production import *  # pylint: disable=wildcard-import, unused-wildcard-import
 
+try:
+    from openedx.core.lib.features_setting_proxy import FeaturesProxy
+    FEATURES = FeaturesProxy(globals())
+except ImportError:
+    pass
+
 # Don't use S3 in devstack, fall back to filesystem
 STORAGES['default']['BACKEND'] = 'django.core.files.storage.FileSystemStorage'
 ORA2_FILEUPLOAD_BACKEND = 'django'