Implement histogram iterators for batch #8989

Job	Run time
build	4m 2s
build	4m 2s
CodeQL	6m 33s
CodeQL	6m 33s
lint	16m 20s
lint	16m 20s
test	18m 3s
test	18m 0s
integration-configs-db	2m 23s
integration-configs-db	2m 23s
integration (requires_docker)	5m 56s
integration (requires_docker)	5m 56s
integration (integration_alertmanager)	3m 55s
integration (integration_alertmanager)	3m 55s
integration (integration_backward_compatibility)	8m 35s
integration (integration_backward_compatibility)	8m 35s
integration (integration_memberlist)	7m 45s
integration (integration_memberlist)	7m 45s
integration (integration_querier)	12m 1s
integration (integration_querier)	12m 1s
integration (integration_ruler)	4m 44s
integration (integration_ruler)	4m 44s
integration (integration_query_fuzz)	2m 25s
integration (integration_query_fuzz)	2m 25s
deploy_website	0s
deploy_website	0s
deploy	0s
deploy	0s
	3h 5m 21s

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