EE port of "Allow asynchronous rebase operations to be monitored" (!14417) · Merge requests · GitLab.org / GitLab · GitLab

The source project of this merge request has been removed.

What does this MR do?

EE version of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/29940

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/54117