AAP-59874: Update to Python 3.12 (#16208)

* update to Python 3.12

* remove use of utcnow

* switch to timezone.utc

datetime.UTC is an alias of datetime.timezone.utc. if we're doing the double import for datetime it's more straightforward to just import timezone as well and get it directly

* debug python env version issue

* change python version

* pin to SHA and remove debug portion

awx/main/dispatch/pool.py

@@ -5,7 +5,7 @@ import signal
 import sys
 import time
 import traceback
-from datetime import datetime
+from datetime import datetime, timezone
 from uuid import uuid4
 import json
 
@@ -301,7 +301,7 @@ class WorkerPool(object):
             '\n'
             '{% endfor %}'
         )
-        now = datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S UTC')
+        now = datetime.now(timezone.utc).strftime('%Y-%m-%d %H:%M:%S UTC')
         return tmpl.render(pool=self, workers=self.workers, meta=self.debug_meta, dt=now)
 
     def write(self, preferred_queue, body):