feat: expectation pattern support #5766

Job	Run time
sample_operators_tests (sample-operators/leader-election)	3m 56s
sample_operators_tests (sample-operators/webpage)	3m 57s
sample_operators_tests (sample-operators/tomcat-operator)	3m 8s
sample_operators_tests (sample-operators/mysql-schema)	3m 5s
	14m 6s

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