Add guard to milestone_token for sort

What does this MR do and why?

In filtered search we are getting sorted issues from the backend so we need to guard on the token to not sort on the frontend as well.

Im not sure if other teams are relying on this so I thought the best way forward was to create a guard.

Resolves #351047 (closed)

Screenshots or screen recordings

These are strongly recommended to assist reviewers and reduce the time to merge your change.

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.