Adding server actions tests to grenade-multinode

We recently found a rolling-upgrade bug on rebuild so we need to make
sure that grenade-multinode can verify all our instance actions.

Given we pin the compute RPC API version to the N-1 compute one, we are
sure that all RPC calls continue to behave the previous release.

NOTE : Given the previous cycle was already supporting 6.2 RPC version,
we can't test here the previous problems hence why this is the last
patch from the series.

Change-Id: I1d8deb139922494dd74ff32965fd7dd74d1d768b
Related-Bug: #2040264

Author: sbauza

.zuul.yaml

@@ -565,7 +565,7 @@
               block_migration_for_live_migration: true
               block_migrate_cinder_iscsi: true
       tox_envlist: all
-      tempest_test_regex: ((tempest\.(api\.compute|scenario)\..*smoke.*)|(^tempest\.api\.compute\.admin\.(test_live_migration|test_migration)))
+      tempest_test_regex: ((tempest\.(api\.compute|scenario)\..*smoke.*)|(^tempest\.api\.compute\.admin\.(test_live_migration|test_migration))|(^tempest\.api\.compute\.servers\.test_server_actions))
       # revert this when bug #1940425 is fixed in neutron
       tempest_exclude_regex: (test_live_migration_with_trunk)