refactor(keys): keep validate_key_team_change permission check on the key's assigned member

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

litellm/proxy/management_endpoints/key_management_endpoints.py

@@ -3876,10 +3876,7 @@ async def validate_key_team_change(
             team_obj=team,
         )
         or TeamMemberPermissionChecks.does_team_member_have_permissions_for_endpoint(
-            team_member_role=_get_caller_team_role(
-                team_table=team_table,
-                user_api_key_dict=change_initiated_by,
-            ),
+            team_member_role=None if member_object is None else member_object.role,
             team_table=team_table,
             route=KeyManagementRoutes.KEY_UPDATE.value,
         )