Drop Python 3.11 tests

We're using 3.14 in the container images now, let's drop 3.11
testing.

Change-Id: If9ce1352b32b7b05cba5e254a602808b41d24c02
Depends-On: https://review.opendev.org/1001383

.zuul.yaml

@@ -124,32 +124,16 @@
       nox_session: zuul_client
 
 - job:
-    name: zuul-nox-py311
+    name: zuul-nox-py314
     parent: zuul-nox
-    nodeset: ubuntu-jammy-16GB
     timeout: 10800  # 180 minutes
+    nodeset: ubuntu-resolute-16GB
     failure-output:
       # This matches stestr output when a test fails
       # {1} tests.unit.test_blah [5.743446s] ... FAILED
       - '\{\d+\} (.*?) \[[\d\.]+s\] \.\.\. FAILED'
     vars:
       nox_keyword: tests
-
-- job:
-    name: zuul-nox-py311-multi-scheduler
-    parent: zuul-nox-py311
-    voting: false
-    vars:
-      nox_environment:
-        ZUUL_SCHEDULER_COUNT: 2
-
-- job:
-    name: zuul-nox-py314
-    # This could probably use some refactoring to have a base unittest job
-    # that isn't python version specific.
-    parent: zuul-nox-py311
-    nodeset: ubuntu-resolute-16GB
-    vars:
       nox_force_python: "3.14"
       python_version: "3.14"
 
@@ -376,7 +360,6 @@
             vars:
               nox_install_bindep: false
             nodeset: ubuntu-jammy
-        - zuul-nox-py311
         - zuul-nox-py314
         - zuul-nox-upgrade
         - zuul-build-dashboard-openstack-whitelabel
@@ -399,9 +382,6 @@
             dependencies: zuul-build-image
         - zuul-nox-zuul-client
         - zuul-build-python-release
-    experimental:
-      jobs:
-        - zuul-nox-py311-multi-scheduler
     gate:
       jobs:
         - zuul-upload-image
@@ -410,7 +390,6 @@
             vars:
               nox_install_bindep: false
             nodeset: ubuntu-jammy
-        - zuul-nox-py311
         - zuul-nox-py314
         - zuul-nox-upgrade
         - zuul-build-dashboard