refactor: remove the use of knownResourceVersions #5696

Job	Run time
sample_operators_tests (sample-operators/mysql-schema)	1m 33s
sample_operators_tests (sample-operators/tomcat-operator)	1m 20s
sample_operators_tests (sample-operators/webpage)	1m 24s
sample_operators_tests (sample-operators/leader-election)	1m 22s
	5m 39s

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