Merge PR #67921 into wip-yuri9-testing-20260622.172413-squid

Merge PR #67921 into wip-yuri9-testing-20260622.172413-squid

* refs/pull/67921/head:
	rgw/test [squid]: add missing ceph and call_ceph shell functions
	RGW/test_multi/RGWBucketFullSyncCR: test bucket full sync while source bucket is deleted in the middle
	RGW/multisite/RGWListRemoteBucketCR: clear reused bucket_list_result to avoid stale listings
	RGW/multisite: bucket_list_result object provides a method to reset its entries
	RGW/multisite: add some more debug logs to sync codepath
	RGW/test_multi: remove unused import
	RGW/test_multi: allow Cluster object to run ceph admin commands
	RGW: add delay injection options for integration testing
	RGW: make SSTR macro safe against variable name collisions