qa/cephfs: update ignorelist

qa/cephfs: update ignorelist

In following 2 jobs from a Squid QA run we see cluster errors/warnings
which are expected but not added to ignorelist which causes these jobs
to fail.

From https://pulpito.ceph.com/xiubli-2024-07-29_02:08:56-fs-wip-xiubli-testing-20240726.021939-squid-distro-default-smithi/7823678 -

	"2024-07-29T05:10:00.000118+0000 mon.smithi057 (mon.0) 879 : cluster [WRN] Health detail: HEALTH_WARN insufficient standby MDS daemons available" in cluster log

From https://pulpito.ceph.com/xiubli-2024-07-29_02:08:56-fs-wip-xiubli-testing-20240726.021939-squid-distro-default-smithi/7823724 -

	"2024-07-29T06:00:00.000144+0000 mon.smithi104 (mon.0) 600 : cluster [ERR] fs cephfs is degraded" in cluster log

"FS_DEGRADED" and "MDS_INSUFFICIENT_STANDBY" are already present in the
ignorelist for these jobs bit these are not sufficient catch above
cluster warninings/errors. Therefore, add "fs.*is degraded" and
"insufficient standby MDS daemons available" too.

Fixes: https://tracker.ceph.com/issues/67303
Signed-off-by: Rishabh Dave <ridave@redhat.com>
(cherry picked from commit c30cdbd14dd8858772b9259804c257977bf973be)

Conflicts:
qa/cephfs/overrides/ignorelist_health.yaml
- File is slightly different from the main branch version which
  prevented a seamless rebase.