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

.github/workflows/ci.yml

@@ -183,14 +183,19 @@ jobs:
           path: awx-operator
 
       - name: Setup python, referencing action at awx relative path
-        uses: ./awx/.github/actions/setup-python
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065
         with:
-          python-version: '3.13'
+          python-version: '3.12'
 
       - name: Install playbook dependencies
         run: |
           python -m pip install docker
 
+      - name: Check Python version
+        working-directory: awx
+        run: |
+          make print-PYTHON
+      
       - name: Build AWX image
         working-directory: awx
         run: |