feat: provide de-duplicated secondary resources stream on Context (#3… #6212

Job	Run time
sample_operators_tests (sample-operators/mysql-schema)	2m 40s
sample_operators_tests (sample-operators/leader-election)	3m 28s
sample_operators_tests (sample-operators/webpage)	3m 3s
sample_operators_tests (sample-operators/tomcat-operator)	3m 9s
	12m 20s

Provide feedback