The failure seemed to be due to incorect detection from gotestsum
itself rather than any failure in the test.
I note that from that time onwards, gotestsum has had a new release
and we are using that.
I also ran the test several times with gotestsum and could not
repro this. Let's hope that the new version of gotestsum has fixed
the issue. Otherwise, there isn't much we can do.
https://mattermost.atlassian.net/browse/MM-54264
```release-note
NONE
```
* Includes mmctl into the mono-repo
* Update to use the new public module paths
* Adds docs check to the mmctl CI
* Fix public utils import path
* Tidy up modules
* Fix linter
* Update CI tasks to use the new file structure
* Update CI references
