Rebase fixes

Author: mauvilsa

jsonargparse_tests/test_dataclass_like.py

@@ -2,6 +2,7 @@
 
 import dataclasses
 import json
+import sys
 from typing import Any, Dict, Generic, List, Literal, Optional, Tuple, TypeVar, Union
 from unittest.mock import patch
 

jsonargparse_tests/test_postponed_annotations.py

@@ -2,6 +2,7 @@
 
 import dataclasses
 import os
+import sys
 from typing import TYPE_CHECKING, Dict, List, Optional, Tuple, Type, Union
 
 import pytest