store: refactor respSet #15890

Job	Run time
Go build for different platforms	9m 18s
Go build with -tags=stringlabels	1m 2s
Check misspelled words	13s
Linters (Static Analysis) for Go	2m 40s
Thanos end-to-end tests (8, 0)	4m 49s
Thanos unit tests	11m 8s
Thanos end-to-end tests (8, 1)	3m 58s
Thanos end-to-end tests (8, 2)	3m 46s
Thanos end-to-end tests (8, 3)	4m 17s
Thanos end-to-end tests (8, 4)	6m 55s
Thanos end-to-end tests (8, 5)	4m 36s
Thanos end-to-end tests (8, 6)	5m 34s
Thanos end-to-end tests (8, 7)	3m 52s
	1h 2m 8s

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