Discuss - removal date for only/except

This is a follow up issue from !31468 (merged)

Background

In %13.0 We've announced the deprecation of only/except keyword, the rules keyword is an improved solution that replaced and enhance the only/except keyword functionality. Our expectation is that users will stop using the only/except keyword and work with rules instead.

This issue is a discussion on when should we remove only/except keyword from our syntax.

Proposal

Prior to the removal of this keyword we should

• Remove the reference from our documentation
• Add a notification(warning) in the UI that this keyword is deprecated and schedule to be removed

Note

• This is a discussion issue only
• There is a concern that this change will cause the existing pipeline (that is are still using the only/except keyword) to stop working
• It's involved breaking change and could roll out only in a major version