cmd/mdatagen: introduce additional metadata for deprecated metrics #32300

Job	Run time
windows-service-test (windows-2022)	2m 56s
windows-service-test (windows-11-arm)	3m 23s
windows-unittest (windows-2025)	11m 36s
windows-unittest (windows-11-arm)	11m 57s
windows-service-test (windows-2025)	3m 6s
windows-unittest (windows-2022)	16m 9s
	49m 7s

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