Add Prometheus exporter to ROCK #224

Job	Run time
unit-tests / Inclusive naming	18s
unit-tests / Inclusive naming	18s
unit-tests / Get runner image / Get runner image	4s
unit-tests / Get runner image / Get runner image	4s
unit-tests / Shell scripts lint	18s
unit-tests / Shell scripts lint	18s
unit-tests / Dockerfile lint	11s
unit-tests / Dockerfile lint	11s
unit-tests / Lint metadata.yaml	15s
unit-tests / Lint metadata.yaml	15s
unit-tests / Draft publish docs	1m 37s
unit-tests / Draft publish docs	1m 37s
unit-tests / Check license headers	1m 23s
unit-tests / Check license headers	1m 23s
unit-tests / Check libraries	30s
unit-tests / Check libraries	30s
unit-tests / Lint and unit tests	19s
unit-tests / Lint and unit tests	49s
unit-tests / Required Test Status Checks	7s
unit-tests / Required Test Status Checks	7s
	10m 34s

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