when supershipit rebuild_merge fails, cannot rebuild_merge again

[felixfontein]

When rebuild_merge fails (say, because of some random test failure totally unrelated to the PR), there doesn't seem to be a way to trigger another CI run. Sending the rebuild_merge command another time doesn't seem to cause anything.

Example: ansible/ansible#51216 (result of latest CI run in that PR, which was run after the first rebuild_merge command.)

[jctanner]

@felixfontein rebuild_merge is only accessible to folks with commit rights. You have supershipit, which sort of acts like rebuild merge.

[jctanner]

I could potentially give rebuild_merge to those with supershipit to make it easier.

[felixfontein]

Ah, so that's different from "normal" rebuild_merge. :) I would be fine if it is somehow possible to restart CI, it doesn't matter that much whether it is via rebuild_merge or some new rebuild command (#1161).