Add naming conventions for CI partitioning

What does this MR do and why?

I think a strong naming convention is important to reduce the confusion factor while working on this initiative.

Extracted from the discussions in !92781 (diffs, comment 1075567840) and !92781 (diffs, comment 1081104724)

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

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.