Query Frontend: Add tenant label to metrics (#6887) #13072

Job	Run time
Thanos end-to-end tests (8, 0)	5m 31s
Thanos end-to-end tests (8, 0)	5m 14s
Linters (Static Analysis) for Go	2m 32s
Linters (Static Analysis) for Go	2m 32s
Thanos end-to-end tests (8, 1)	4m 13s
Thanos end-to-end tests (8, 1)	4m 13s
Thanos end-to-end tests (8, 2)	4m 58s
Thanos end-to-end tests (8, 2)	4m 58s
Thanos end-to-end tests (8, 3)	4m 50s
Thanos end-to-end tests (8, 3)	4m 50s
Thanos end-to-end tests (8, 4)	7m 31s
Thanos end-to-end tests (8, 4)	7m 31s
Thanos end-to-end tests (8, 5)	4m 47s
Thanos end-to-end tests (8, 5)	4m 47s
Thanos end-to-end tests (8, 6)	4m 31s
Thanos end-to-end tests (8, 6)	4m 31s
Thanos end-to-end tests (8, 7)	4m 20s
Thanos end-to-end tests (8, 7)	4m 14s
Go build for different platforms	4m 40s
Go build for different platforms	4m 40s
	1h 35m 23s

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