Replace deprecated datetime.utcnow()

The datetime.utcnow() is deprecated in Python 3.12.
Replace datetime.utcnow() with
datetime.now(datetime.timezone.utc).replace(tzinfo=None).

Change-Id: Ic20174a9c6cacac05471fa57b105c1f784a73057
Signed-off-by: Takashi Natsume <takanattie@gmail.com>

Author: takanattie

openstackclient/compute/v2/usage.py

@@ -153,7 +153,7 @@ def _format_project(project):
         )
 
         date_cli_format = "%Y-%m-%d"
-        now = datetime.datetime.utcnow()
+        now = datetime.datetime.now(datetime.timezone.utc).replace(tzinfo=None)
 
         if parsed_args.start:
             start = datetime.datetime.strptime(
@@ -238,7 +238,7 @@ def take_action(self, parsed_args):
         identity_client = self.app.client_manager.identity
         compute_client = self.app.client_manager.sdk_connection.compute
         date_cli_format = "%Y-%m-%d"
-        now = datetime.datetime.utcnow()
+        now = datetime.datetime.now(datetime.timezone.utc).replace(tzinfo=None)
 
         if parsed_args.start:
             start = datetime.datetime.strptime(

openstackclient/tests/functional/identity/v3/test_application_credential.py

@@ -107,7 +107,8 @@ def test_application_credential_create_with_options(self):
         secret = data_utils.rand_name('secret')
         description = data_utils.rand_name('description')
         tomorrow = (
-            datetime.datetime.utcnow() + datetime.timedelta(days=1)
+            datetime.datetime.now(datetime.timezone.utc).replace(tzinfo=None)
+            + datetime.timedelta(days=1)
         ).strftime('%Y-%m-%dT%H:%M:%S%z')
         role1, role2 = self._create_role_assignments()
         raw_output = self.openstack(