cmd/mdatagen: introduce additional metadata for deprecated metrics #42605

Job	Run time
contrib-tests-prepare	6m 3s
contrib-tests-matrix (processor)	7m 59s
contrib-tests-matrix (receiver-1)	10m 24s
contrib-tests-matrix (receiver-0)	10m 53s
contrib-tests-matrix (exporter-0)	3m 33s
contrib-tests-matrix (receiver-3)	8m 21s
contrib-tests-matrix (pkg)	7m 12s
contrib-tests-matrix (extension)	10m 34s
contrib-tests-matrix (connector)	5m 4s
contrib-tests-matrix (internal)	13m 19s
contrib-tests-matrix (receiver-2)	10m 29s
contrib-tests-matrix (exporter-1)	10m 8s
contrib-tests-matrix (cmd-0)	2m 58s
contrib-tests-matrix (other)	5m 47s
contrib_tests	3s
	1h 52m 47s

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