Merge PR #69057 into wip-pdonnell-testing-20260522.223743-squid

* refs/pull/69057/head:
	qa/suites/upgrade: ignore temporary OSD_HOST_DOWN health warning
	qa/suites/upgrade: ignore PG_DAMAGED
	qa/suites/upgrade: add "OBJECT_UNFOUND" to ignorelists
	qa/suites/upgrade: ignore "osd down" cluster log variations
	qa/suites/rados/thrash-old-clients: ignore warnings about peering PGs
	qa/suites/upgrade: add expected filesystem warnings to ignorelist
	qa: ignore expected OSD_ROOT_DOWN
	qa: ignore fs offline warning
	qa: add MDS_INSUFFICIENT_STANDBY to ignorelist
	qa/suites/upgrade: use common ignorelist

diff --cc qa/suites/upgrade/quincy-x/stress-split/1-start.yaml
Simple merge

diff --cc qa/suites/upgrade/reef-x/stress-split/1-start.yaml
Simple merge