Extend posting-group-max-key-series-ratio for add all posting group (… #15894

Job	Run time
Go build with -tags=stringlabels	34s
Check misspelled words	12s
Go build for different platforms	5m 24s
Thanos end-to-end tests (8, 0)	4m 59s
Linters (Static Analysis) for Go	2m 54s
Thanos unit tests	11m 22s
Thanos end-to-end tests (8, 1)	3m 41s
Thanos end-to-end tests (8, 2)	3m 52s
Thanos end-to-end tests (8, 3)	4m 13s
Thanos end-to-end tests (8, 4)	7m 7s
Thanos end-to-end tests (8, 5)	4m 16s
Thanos end-to-end tests (8, 6)	5m 1s
Thanos end-to-end tests (8, 7)	4m 1s
	57m 36s

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