qa: ignore variant of down fs

Fixes: https://tracker.ceph.com/issues/70107
Signed-off-by: Patrick Donnelly <[email protected]>

Author: batrick

qa/cephfs/overrides/ignorelist_health.yaml

@@ -8,6 +8,7 @@ overrides:
       - FS_WITH_FAILED_MDS
       - MDS_ALL_DOWN
       - filesystem is offline
+      - is offline because no MDS
       - MDS_DAMAGE
       - MDS_DEGRADED
       - MDS_FAILED