Revert "BOM-2368: pyupgrade in LMS Directory (#26649)"

This reverts commit fc06846cb0.

lms/envs/devstack_decentralized.py

@@ -7,6 +7,7 @@ import logging
 from os.path import abspath, dirname, join
 
 from corsheaders.defaults import default_headers as corsheaders_default_headers
+
 # pylint: enable=unicode-format-string  # lint-amnesty, pylint: disable=bad-option-value
 #####################################################################
 from edx_django_utils.plugins import add_plugins
@@ -32,9 +33,9 @@ SITE_NAME = LMS_BASE
 CELERY_ALWAYS_EAGER = True
 HTTPS = 'off'
 
-LMS_ROOT_URL = f'http://{LMS_BASE}'
+LMS_ROOT_URL = 'http://{}'.format(LMS_BASE)
 LMS_INTERNAL_ROOT_URL = LMS_ROOT_URL
-ENTERPRISE_API_URL = f'{LMS_INTERNAL_ROOT_URL}/enterprise/api/v1/'
+ENTERPRISE_API_URL = '{}/enterprise/api/v1/'.format(LMS_INTERNAL_ROOT_URL)
 IDA_LOGOUT_URI_LIST = [
     'http://localhost:18130/logout/',  # ecommerce
     'http://localhost:18150/logout/',  # credentials
@@ -217,10 +218,10 @@ LOGIN_REDIRECT_WHITELIST = [CMS_BASE]
 ###################### JWTs ######################
 JWT_AUTH.update({
     'JWT_AUDIENCE': 'lms-key',
-    'JWT_ISSUER': f'{LMS_ROOT_URL}/oauth2',
+    'JWT_ISSUER': '{}/oauth2'.format(LMS_ROOT_URL),
     'JWT_ISSUERS': [{
         'AUDIENCE': 'lms-key',
-        'ISSUER': f'{LMS_ROOT_URL}/oauth2',
+        'ISSUER': '{}/oauth2'.format(LMS_ROOT_URL),
         'SECRET_KEY': 'lms-secret',
     }],
     'JWT_SECRET_KEY': 'lms-secret',
@@ -320,7 +321,7 @@ ENTERPRISE_MARKETING_FOOTER_QUERY_PARAMS = {}
 CREDENTIALS_SERVICE_USERNAME = 'credentials_worker'
 
 COURSE_CATALOG_URL_ROOT = 'http://edx.devstack.discovery:18381'
-COURSE_CATALOG_API_URL = f'{COURSE_CATALOG_URL_ROOT}/api/v1'
+COURSE_CATALOG_API_URL = '{}/api/v1'.format(COURSE_CATALOG_URL_ROOT)
 
 SYSTEM_WIDE_ROLE_CLASSES = os.environ.get("SYSTEM_WIDE_ROLE_CLASSES", SYSTEM_WIDE_ROLE_CLASSES)
 SYSTEM_WIDE_ROLE_CLASSES.append(