The use of `alias` to enforce `chg` and `rhg` means we are actually using a mix
of `rhg`/`chg` and `hg` when calling `hg` in the test. Fixing this breaks
various tests. This would be a large detour to fix that. I am disabling
them for now with an appropriate comment.
We would hopefully get back to them by the 5.8 release.