PIP-264: Enhanced OTel-based metric system

[asafm]

All content has been relocated as a PR based on the new process for PIPs: #21080

[github-actions]

The issue had no activity for 30 days, mark with Stale label.

[asafm]

Still in discussion / review phases be several members of the community

[github-actions]

The issue had no activity for 30 days, mark with Stale label.

[asafm]

Still waiting on 2 people reviewing it

[asafm]

The PIP which is a PR now was merged, hence closing. We'll follow up with a link to a parent issue detailing the execution plan so everyone interesting can follow up on it.