feat: metricsV2 + oTel + prometheus sample and Grafana dashboard #6286

Job	Run time
sample_operators_tests (sample-operators/mysql-schema)	5m 8s
sample_operators_tests (sample-operators/webpage)	3m 25s
sample_operators_tests (sample-operators/metrics-processing)	4m 51s
sample_operators_tests (sample-operators/tomcat-operator)	2m 45s
sample_operators_tests (sample-operators/leader-election)	3m 21s
	19m 30s

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