Replace performance analytics commits number to pushes number in group level

What does this MR do and why?

Replace performance analytics commits number to push number at group level.

Screenshots or screen recordings

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Relative to #1462 (closed)