Merge branch 'grapify-tags' into 'master'

Grapify tags API

## What does this MR do?

Add the Grape-DSL to the tags API.

## Are there points in the code the reviewer needs to double check?

The delete endpoint only has a description but no success entity because we don't have one. We only return the branch name as JSON. Should I do something else?

## What are the relevant issue numbers?

Related to #22928

See merge request !6860