feat: add feature switch to use SSA for managing finalizer #5266

Job	Run time
sample_operators_tests (sample-operators/webpage)	2m 38s
sample_operators_tests (sample-operators/mysql-schema)	2m 41s
sample_operators_tests (sample-operators/leader-election)	2m 40s
sample_operators_tests (sample-operators/tomcat-operator)	2m 24s
sample_operators_tests (sample-operators/mysql-schema)	2m 44s
sample_operators_tests (sample-operators/webpage)	2m 58s
sample_operators_tests (sample-operators/leader-election)	3m 11s
sample_operators_tests (sample-operators/tomcat-operator)	3m 8s
	22m 24s

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