Native Histogram Custom Buckets

[yeya24]

This is the main tracking issue for adding Native Histogram Custom Buckets(nhcb) support in Cortex.

Upstream tracking issue: prometheus/prometheus#13485

[stale]

This issue has been automatically marked as stale because it has not had any activity in the past 60 days. It will be closed in 15 days if no further activity occurs. Thank you for your contributions.