Creating new metric around chunks bytespool #7706

Job	Run time
test	25m 39s
lint	6m 19s
build	6m 9s
integration-configs-db	2m 53s
integration (requires_docker)	6m 4s
integration (integration_alertmanager)	4m 52s
integration (integration_backward_compatibility)	12m 8s
integration (integration_memberlist)	9m 4s
integration (integration_querier)	14m 22s
integration (integration_ruler)	4m 24s
integration (integration_query_fuzz)	2m 46s
deploy	0s
deploy_website	0s
	1h 34m 40s

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