Update 'Maintained' stable branch jobs on master gate

We have stable/yoga released and stable/ussuri is in
'Extended Maintenance' state. Current 'Maintained'
stable branches are yoga, xena, wallaby, and victoria.

As per tempest stable branch testing policy[1], adding the
newly released stable/yoga job and remove the EM stable/ussuri
job.

[1] https://docs.openstack.org/tempest/latest/stable_branch_testing_policy.html

Change-Id: I925264fd0cff732181ec44c76310225b93490284

.zuul.yaml

@@ -12,10 +12,10 @@
             voting: false
         - cinder-tempest-plugin-cbak-ceph
         - cinder-tempest-plugin-cbak-s3
+        - cinder-tempest-plugin-basic-yoga
         - cinder-tempest-plugin-basic-xena
         - cinder-tempest-plugin-basic-wallaby
         - cinder-tempest-plugin-basic-victoria
-        - cinder-tempest-plugin-basic-ussuri
         # Set this job to voting once we have some actual tests to run
         - cinder-tempest-plugin-protection-functional:
             voting: false
@@ -26,10 +26,10 @@
         - cinder-tempest-plugin-cbak-ceph
     experimental:
       jobs:
+        - cinder-tempest-plugin-cbak-ceph-yoga
         - cinder-tempest-plugin-cbak-ceph-xena
         - cinder-tempest-plugin-cbak-ceph-wallaby
         - cinder-tempest-plugin-cbak-ceph-victoria
-        - cinder-tempest-plugin-cbak-ceph-ussuri
 
 - job:
     name: cinder-tempest-plugin-protection-functional
@@ -158,6 +158,12 @@
       devstack_services:
         c-bak: true
 
+- job:
+    name: cinder-tempest-plugin-cbak-ceph-yoga
+    parent: cinder-tempest-plugin-cbak-ceph
+    nodeset: openstack-single-node-focal
+    override-checkout: stable/yoga
+
 - job:
     name: cinder-tempest-plugin-cbak-ceph-xena
     parent: cinder-tempest-plugin-cbak-ceph
@@ -176,12 +182,6 @@
     nodeset: openstack-single-node-focal
     override-checkout: stable/victoria
 
-- job:
-    name: cinder-tempest-plugin-cbak-ceph-ussuri
-    parent: cinder-tempest-plugin-cbak-ceph
-    nodeset: openstack-single-node-bionic
-    override-checkout: stable/ussuri
-
 # variant for pre-Ussuri branches (no volume revert for Ceph),
 # should this job be used on those branches
 - job:
@@ -257,6 +257,12 @@
       - ^doc/.*$
       - ^releasenotes/.*$
 
+- job:
+    name: cinder-tempest-plugin-basic-yoga
+    parent: cinder-tempest-plugin-basic
+    nodeset: openstack-single-node-focal
+    override-checkout: stable/yoga
+
 - job:
     name: cinder-tempest-plugin-basic-xena
     parent: cinder-tempest-plugin-basic
@@ -274,9 +280,3 @@
     parent: cinder-tempest-plugin-basic
     nodeset: openstack-single-node-focal
     override-checkout: stable/victoria
-
-- job:
-    name: cinder-tempest-plugin-basic-ussuri
-    parent: cinder-tempest-plugin-basic
-    nodeset: openstack-single-node-bionic
-    override-checkout: stable/ussuri