The datetime.utcfromtimestamp() and datetime.utcnow()
are deprecated in Python 3.12.
Replace datetime.utcfromtimestamp() with datetime.fromtimestamp().
Replace datetime.utcnow() with oslo_utils.timeutils.utcnow() or
datetime.now().
This removes glance's in-tree 'delta_seconds' and 'utcnow'
implementation and replaces the delta_seconds implementation
with oslo_utils.timeutils.delta_seconds().
Change-Id: I509594dd29a8e50ad94b3c53e8f55037b3548add
Signed-off-by: Takashi Natsume <takanattie@gmail.com>
1f8a84cdcc