Patch us-east-1 detection logic.

Author: aemous

awscli/customizations/globalargs.py

@@ -133,12 +133,12 @@ def detect_migration_breakage(parsed_args, remaining_args, session, **kwargs):
                 out_file=sys.stderr
             )
     if (
-        s3_config is None or (
-            s3_config is not None and s3_config.get(
-                'us_east_1_regional_endpoint',
-                'legacy'
-            ) == 'legacy' and region in ('us-east-1', None)
-        )
+            (s3_config is None or (
+                s3_config is not None and s3_config.get(
+                    'us_east_1_regional_endpoint',
+                    'legacy'
+                ) == 'legacy')) and region in ('us-east-1', None)
+            and parsed_args.endpoint_url is None
     ):
         session.register(
             'request-created.s3.*',