Update grenade setting on current master

grenade is branched for stable/2023.2, so updating
the current master default setting for:
- Update grenade testing from stable/2023.2 to master.
- Update grenade-skip-level and grenade-skip-level-always
  jobs to upgrade from stable/2023.1 -> master

Change-Id: I1dbea0caad676d6be7a4a58495a76a351e3c41e5

.zuul.yaml

@@ -389,7 +389,7 @@
       # For the base "always" job, this should always be the N-2 release from
       # current master for projects that want to assert N-2 upgradability
       # on all releases.
-      grenade_from_branch: stable/zed
+      grenade_from_branch: stable/2023.1
       grenade_localrc:
         NOVA_ENABLE_UPGRADE_WORKAROUND: True
 
@@ -398,7 +398,7 @@
     description: |
       Grenade job that skips a release, validating that deployers can skip
       specific releases as prescribed by our process.
-    nodeset: openstack-single-node-focal
+    nodeset: openstack-single-node-jammy
     parent: grenade-skip-level-always
       # Move this forward when master changes to a new skip-level-allowed
       # target release. Right now, this is stable/yoga because current master is 2023.1
@@ -409,7 +409,7 @@
       # on current master. If you would like to run N-2 -> N upgrade testing on current
       # non SLURP master then use grenade-skip-level-always job.
     vars:
-      grenade_from_branch: stable/yoga
+      grenade_from_branch: stable/2023.1
     # NOTE(gmann): This job is started and meant to be run from Yoga release.
     # This job is meant to validate the SLURP to SLURP release
     # upgrade so supposed to run on SLURP release gate only. To make sure
@@ -422,5 +422,5 @@
     # also and in this job definition, we control for everyone to run on SLURP
     # release only.
     branches:
-      regex: ^master|stable/(train|ussuri|victoria|wallaby|xena|zed)$
+      regex: ^stable/(train|ussuri|victoria|wallaby|xena|zed|2023.2)$
       negate: true

roles/configure-grenade-branches/defaults/main.yaml

@@ -1,3 +1,3 @@
 ---
-grenade_from_branch: stable/2023.1
+grenade_from_branch: stable/2023.2
 grenade_to_branch: master