Creating new metric around chunks bytespool #7705

Job	Run time
lint	6m 14s
build	6m 53s
test	21m 51s
integration-configs-db	2m 55s
integration (requires_docker)	6m 10s
integration (integration_alertmanager)	4m 38s
integration (integration_backward_compatibility)	11m 45s
integration (integration_memberlist)	9m 0s
integration (integration_querier)	13m 52s
integration (integration_ruler)	5m 2s
integration (integration_query_fuzz)	3m 1s
deploy_website	0s
deploy	0s
	1h 31m 21s

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