fix: don't fail test if the CRD cannot be deleted #4996

Job	Run time
sample_operators_tests (sample-operators/mysql-schema)	2m 43s
sample_operators_tests (sample-operators/tomcat-operator)	2m 40s
sample_operators_tests (sample-operators/webpage)	3m 4s
sample_operators_tests (sample-operators/leader-election)	3m 7s
	11m 34s

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