feat: strong consistency variant for informer list and byIndex #6928

Job	Run time
sample_operators_tests (sample-operators/leader-election)	3m 16s
sample_operators_tests (sample-operators/mysql-schema)	3m 31s
sample_operators_tests (sample-operators/metrics-processing)	8m 9s
sample_operators_tests (sample-operators/webpage)	3m 8s
sample_operators_tests (sample-operators/tomcat-operator)	3m 2s
	21m 6s

Provide feedback