Avoid deprecated utcnow() (#8222)

Avoid deprecated utcnow().

plugins/module_utils/datetime.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2023 Felix Fontein <felix@fontein.de>
+# Simplified BSD License (see LICENSES/BSD-2-Clause.txt or https://opensource.org/licenses/BSD-2-Clause)
+# SPDX-License-Identifier: BSD-2-Clause
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import datetime as _datetime
+import sys
+
+
+_USE_TIMEZONE = sys.version_info >= (3, 6)
+
+
+def ensure_timezone_info(value):
+    if not _USE_TIMEZONE or value.tzinfo is not None:
+        return value
+    return value.astimezone(_datetime.timezone.utc)
+
+
+def fromtimestamp(value):
+    if _USE_TIMEZONE:
+        return _datetime.fromtimestamp(value, tz=_datetime.timezone.utc)
+    return _datetime.utcfromtimestamp(value)
+
+
+def now():
+    if _USE_TIMEZONE:
+        return _datetime.datetime.now(tz=_datetime.timezone.utc)
+    return _datetime.datetime.utcnow()