Implement histogram iterators for batch #8955

Job	Run time
lint	17m 32s
lint	17m 32s
test	18m 39s
test	18m 39s
build	4m 48s
build	4m 48s
CodeQL	6m 36s
CodeQL	6m 36s
integration-configs-db	2m 24s
integration-configs-db	2m 24s
integration (requires_docker)	5m 40s
integration (requires_docker)	5m 40s
integration (integration_alertmanager)	3m 57s
integration (integration_alertmanager)	3m 57s
integration (integration_backward_compatibility)	8m 46s
integration (integration_backward_compatibility)	8m 46s
integration (integration_memberlist)	7m 31s
integration (integration_memberlist)	7m 31s
integration (integration_querier)	12m 9s
integration (integration_querier)	12m 9s
integration (integration_ruler)	4m 5s
integration (integration_ruler)	4m 1s
integration (integration_query_fuzz)	2m 15s
integration (integration_query_fuzz)	2m 15s
deploy_website	0s
deploy_website	0s
deploy	0s
deploy	0s
	3h 8m 40s

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