[Feature Request]: Make git username and email configurable (#9942)

Co-authored-by: openhands <openhands@all-hands.dev>

openhands/runtime/utils/command.py

@@ -57,6 +57,10 @@ def get_action_execution_server_startup_command(
         username,
         '--user-id',
         str(user_id),
+        '--git-user-name',
+        app_config.git_user_name,
+        '--git-user-email',
+        app_config.git_user_email,
         *browsergym_args,
     ]