Add detailed messaging about in-progress GitLab direct transfer
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=391198) </details> <!--IssueSummary end--> Currently whenever a user uses GitLab direct transfer, they don't have much visibility into the migration itself. They do see which groups/projects are 'in progress' and see any failures that occurred, but there's no visibility into the following cases: - When migration is waiting for export to finish exporting data. This is particularly useful when the migration is 'stuck' waiting for source gitlab to complete export - Which type of relation is 'currently' importing - Which stage (out of how many) is currently running It would be good to add this information so user can understand where the overall migration is at.
issue