Add integrated job to test the Nova RBAC old defaults

Nova has enabled the scope checks and new defaults in
antelope release and now devstack is switching the testing
to new defaults by default (depends-on). With that all the
jobs will run the the new defaults.

As old defaults are still supported (as deprecated), we should
test those at least in a single integrated job. Adding
new job tempest-integrated-compute-rbac-old-defaults to test those
old defaults.

Keeping existing job enabling the new defaults because other services
have not switched to new defaults yet to this job enable new defaults
for those service and test Nova against that.

Depends-On: https://review.opendev.org/c/openstack/devstack/+/883601
Change-Id: Ifc3d0abe3e4caab701b695d3781f20ab3dba267d

.zuul.yaml

@@ -684,11 +684,20 @@
         # they need keystone to continue working with project scope. Until
         # Keystone policies are changed to work for project scoped also, we
         # need to keep scope check disable for keystone.
-        NOVA_ENFORCE_SCOPE: true
+        # Nova and Glance scope and new defaults are enabled by default in
+        # Devstack so we do not need to explicitly set that to True.
         CINDER_ENFORCE_SCOPE: true
-        GLANCE_ENFORCE_SCOPE: true
         NEUTRON_ENFORCE_SCOPE: true
 
+- job:
+    name: tempest-integrated-compute-rbac-old-defaults
+    parent: tempest-integrated-compute
+    description: |
+      This job runs the Tempest tests with Nova RBAC old defaults
+    vars:
+      devstack_localrc:
+        NOVA_ENFORCE_SCOPE: false
+
 - project:
     # Please try to keep the list of job names sorted alphabetically.
     templates:
@@ -747,6 +756,8 @@
              - ^tox.ini$
         - tempest-integrated-compute-enforce-scope-new-defaults:
             irrelevant-files: *policies-irrelevant-files
+        - tempest-integrated-compute-rbac-old-defaults:
+            irrelevant-files: *policies-irrelevant-files
         - grenade-skip-level-always:
             irrelevant-files: *policies-irrelevant-files
         - nova-grenade-multinode:
@@ -782,6 +793,8 @@
            irrelevant-files: *policies-irrelevant-files
         - tempest-integrated-compute-enforce-scope-new-defaults:
             irrelevant-files: *policies-irrelevant-files
+        - tempest-integrated-compute-rbac-old-defaults:
+            irrelevant-files: *policies-irrelevant-files
         - grenade-skip-level-always:
             irrelevant-files: *policies-irrelevant-files
         - nova-grenade-multinode: