improve: simplified MicrometerMetricsV2 builder api (#3220) #6587

Job	Run time
sample_operators_tests (sample-operators/webpage)	3m 21s
sample_operators_tests (sample-operators/metrics-processing)	7m 44s
sample_operators_tests (sample-operators/tomcat-operator)	3m 3s
sample_operators_tests (sample-operators/mysql-schema)	3m 5s
sample_operators_tests (sample-operators/leader-election)	3m 18s
	20m 31s

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