[3.5] *: keep tombstone if revision == compactAtRev #14910

Job	Run time
arm64 / test (linux-test-smoke)	4m 38s
arm64 / test (linux-test-smoke)	4m 38s
amd64 / test (linux-test-smoke)	5m 55s
amd64 / test (linux-test-smoke)	5m 55s
arm64 / test (linux-integration-1-cpu)	6m 4s
arm64 / test (linux-integration-1-cpu)	6m 21s
arm64 / test (linux-integration-2-cpu)	6m 5s
arm64 / test (linux-integration-2-cpu)	6m 5s
arm64 / test (linux-integration-4-cpu)	6m 11s
arm64 / test (linux-integration-4-cpu)	6m 11s
amd64 / test (linux-integration-1-cpu)	6m 20s
amd64 / test (linux-integration-1-cpu)	6m 20s
amd64 / test (linux-integration-2-cpu)	5m 56s
amd64 / test (linux-integration-2-cpu)	5m 56s
arm64 / test (linux-unit-4-cpu-race)	3m 57s
arm64 / test (linux-unit-4-cpu-race)	3m 57s
amd64 / test (linux-integration-4-cpu)	5m 58s
amd64 / test (linux-integration-4-cpu)	5m 58s
amd64 / test (linux-unit-4-cpu-race)	3m 9s
amd64 / test (linux-unit-4-cpu-race)	3m 9s
amd64 / test (linux-386-unit-1-cpu)	1m 31s
amd64 / test (linux-386-unit-1-cpu)	1m 31s
amd64 / test (all-build)	5m 30s
amd64 / test (all-build)	5m 30s
	2h 2m 45s

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