CBG-4416 Use waitForTombstoneVersion to validate tombstone versions #12476

Job	Run time
python-format	5s
lint	1m 59s
build	1m 21s
addlicense	17s
python-lint	11s
test-default-collection	3m 31s
test-race	3m 32s
test (macos)	3m 38s
test-sgcollect (macos-latest)	51s
test (windows)	3m 25s
test-stats-definition-exporter (macos-latest)	1m 33s
test-sgcollect (windows-latest)	3m 19s
test (ubuntu)	3m 32s
test-stats-definition-exporter (windows-latest)	2m 14s
test-sgcollect (ubuntu-latest)	27s
test-stats-definition-exporter (ubuntu-latest)	1m 15s
	31m 10s

Provide feedback