CI: Switch to Fedora 36

...because Vexxhost pulled the plug on the F35 mirroring infrastructure,
and as a result, all jobs started failing.

Change-Id: Ib5d795397e907de3eff6cdb9c4145353400793ab
Depends-on: https://review.gerrithub.io/c/Telecominfraproject/oopt-zuul-jobs/+/548583

.zuul.yaml

@@ -8,6 +8,27 @@
         - tox-py39:
             vars:
               ensure_tox_version: '<4'
+        - tox-py310-cover:
+            vars:
+              ensure_tox_version: '<4'
+        - tox-docs-f36:
+            vars:
+              ensure_tox_version: '<4'
+        - coverage-diff:
+            voting: false
+            dependencies:
+              - tox-py310-cover-previous
+              - tox-py310-cover
+            vars:
+              coverage_job_name_previous: tox-py310-cover-previous
+              coverage_job_name_current: tox-py310-cover
+        - tox-linters-diff-n-report:
+            voting: false
+            vars:
+              ensure_tox_version: '<4'
+        - tox-py310-cover-previous:
+            vars:
+              ensure_tox_version: '<4'
     tag:
       jobs:
         - oopt-release-python: