feat: metricsV2 + oTel + prometheus sample and Grafana dashboard #6460

Job	Run time
sample_operators_tests (sample-operators/webpage)	3m 1s
sample_operators_tests (sample-operators/mysql-schema)	5m 25s
sample_operators_tests (sample-operators/leader-election)	3m 16s
sample_operators_tests (sample-operators/metrics-processing)	5m 40s
sample_operators_tests (sample-operators/tomcat-operator)	2m 42s
sample_operators_tests (sample-operators/mysql-schema)	2m 42s
sample_operators_tests (sample-operators/metrics-processing)	6m 41s
sample_operators_tests (sample-operators/leader-election)	3m 16s
sample_operators_tests (sample-operators/webpage)	3m 1s
sample_operators_tests (sample-operators/tomcat-operator)	2m 42s
	38m 26s

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