Drop Fedora support

We are about to drop Fedora support as the latest image in upstream has been transitioned to EOL. Centos 9 Stream has evolved as replacement platform for new features.

Change-Id: Ifd2dd4e9fa568e35268b801452b95b37226c6e0c

.zuul.yaml

@@ -1,27 +1,4 @@
 ---
-- job:
-    name: validations-libs-podified-podman
-    parent: devstack-platform-fedora-latest
-    run: playbooks/validations-libs-podified.yaml
-    post-run: playbooks/post.yaml
-    timeout: 7200
-    voting: true
-    required-projects:
-      - openstack/validations-libs
-      - openstack/validations-common
-      - name: openstack/openstacksdk
-        override-checkout: master
-      - name: opendev.org/openstack/devstack
-        override-checkout: master
-    vars:
-      container_engine: podman
-      devstack_localrc:
-        USE_PYTHON3: true
-    irrelevant-files:
-      - ^.*\.rst$
-      - ^doc/.*$
-      - ^releasenotes/.*$
-
 - job:
     name: validations-libs-podified-docker
     parent: validations-libs-podified-podman
@@ -127,4 +104,4 @@
               - validations-libs-functional
     promote:
       jobs:
-        - promote-openstack-tox-docs: *tripleo-docs
+        - promote-openstack-tox-docs: *tripleo-docs