[CI] Grenade testing updates

Grenade on this branch should test:
- upgrading from 2023.2 to 2024.1 (current)
- upgrading from 2023.1 to 2024.1 (skipping 2023.2)

Both of these tests must be "voting".
Also drop some deprecated config params in the job definitions.

Change-Id: I90ac6586d1a35d42edd2fcd329d18ef15acada9e
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>

zuul.d/grenade-jobs.yaml

@@ -28,12 +28,6 @@
           MANILA_CONFIGURE_DEFAULT_TYPES: true
           SHARE_DRIVER: manila.share.drivers.lvm.LVMShareDriver
           MANILA_ENABLED_BACKENDS: london,paris
-          # TODO(vkmc) Grenade uses prior branch for running tests
-          # Drop this variables in Xena once Wallaby is shipped
-          MANILA_BACKEND1_CONFIG_GROUP_NAME: london
-          MANILA_BACKEND2_CONFIG_GROUP_NAME: paris
-          MANILA_SHARE_BACKEND1_NAME: LONDON
-          MANILA_SHARE_BACKEND2_NAME: PARIS
           MANILA_OPTGROUP_london_driver_handles_share_servers: false
           MANILA_OPTGROUP_paris_driver_handles_share_servers: false
           SHARE_BACKING_FILE_SIZE: 32000M
@@ -97,6 +91,4 @@
     vars:
       # Move this forward when a new release cycle start. grenade_from_branch
       # should be always N-2 from master.
-      grenade_from_branch: stable/zed
+      grenade_from_branch: stable/2023.1
-      grenade_localrc:
-        NOVA_ENABLE_UPGRADE_WORKAROUND: True

zuul.d/project.yaml

@@ -26,13 +26,8 @@
             voting: false
         - manila-tempest-plugin-lvm-fips:
             voting: false
-        - manila-grenade:
+        - manila-grenade
-            voting: false
+        - manila-grenade-skip-level-always
-        # NOTE: this job needs to be voting in SLURP release and option to
-        # voting in non SLURP. But keeping it voting in non SLURP also will
-        # help us to know any upgrade break in advance.
-        - manila-grenade-skip-level-always:
-            voting: false
         - manila-rally-no-ss:
             voting: false
         - manila-rally-ss: