refactor(git): principled way to set git configuration for agents & re-enable git settings in UI (#10293)

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

openhands/runtime/utils/command.py

@@ -57,10 +57,6 @@ 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,
     ]