Remove Fedora from the CI

It is currently broken since the only supported version (36) is EOL.
The OpenDev infrastructure will stop supporting Fedora:
https://lists.opendev.org/archives/list/service-discuss@lists.opendev.org/thread/IOYIYWGTZW3TM4TR2N47XY6X7EB2W2A6/

The UEFI netboot job has been migrated to Stream 9.

Change-Id: Ie4e67491a62a4c6cb4ca9d6e700cfc226a121235

doc/source/install/index.rst

@@ -24,13 +24,11 @@ Full support (fully tested in the CI, no known or potential issues):
 
 Limited support, may be removed at any moment:
 
-* Fedora 34 (32+ is supported but not recommended)
 * Ubuntu 20.04 "Focal"
 
 .. note::
    Operating systems evolve and so does the support for them, even on stable
-   branches. This especially concerns Fedora, which is evolving faster than
-   other distributions.
+   branches.
 
 Bifrost structure
 =================

releasenotes/notes/no-fedora-b316bb3147f01166.yaml

@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    Support for Fedora is no longer tested in the CI and will be removed from
+    the code in the near future.

zuul.d/bifrost-jobs.yaml

@@ -144,6 +144,13 @@
       test_driver: redfish
       use_vmedia: true
 
+- job:
+    name: bifrost-integration-redfish-pxe-uefi-centos-9
+    parent: bifrost-integration-tinyipa-centos-9
+    vars:
+      enable_grub_network_boot: true
+      test_driver: redfish
+
 - job:
     name: bifrost-integration-tinyipa-centos-9
     parent: bifrost-integration-tinyipa
@@ -166,18 +173,6 @@
     parent: bifrost-integration-tinyipa
     nodeset: debian-bullseye
 
-- job:
-    name: bifrost-integration-tinyipa-fedora-latest
-    parent: bifrost-integration-tinyipa
-    nodeset: fedora-latest
-
-- job:
-    name: bifrost-integration-redfish-uefi-fedora-latest
-    parent: bifrost-integration-tinyipa-fedora-latest
-    vars:
-      enable_grub_network_boot: true
-      test_driver: redfish
-
 - job:
     name: bifrost-tox-linters
     parent: openstack-tox-linters

zuul.d/project.yaml

@@ -19,9 +19,7 @@
         # Non-voting jobs
         - bifrost-integration-tinyipa-keystone-ubuntu-focal:
             voting: false
-        - bifrost-integration-tinyipa-fedora-latest:
-            voting: false
-        - bifrost-integration-redfish-uefi-fedora-latest:
+        - bifrost-integration-redfish-pxe-uefi-centos-9:
             voting: false
         - bifrost-integration-dhcp-ubuntu-jammy:
             voting: false