Show commits involved in merged MRs

This isn't a bug, but the list of templates (which should be labelled "templates", not "description") doesn't seem to have anything for improving the UI.

The current "merged MRs" view, on https://gitlab.com/yourname/yourproject/-/merge_requests?scope=all&state=merged, is missing important information, not having commit hash links for:

1. the "head" commit hash for the MR,
2. the parent commit hash that the MR got merged into, and
3. the resulting commit hash.

Without this information, it is impossible to easily look up a problematic merges after the fact, when running a git bisect days, weeks, or even months later on a codebase. Right now, one has to open up every single MR and then checking it to see if it's the one for the commit that the bisect process flagged as introducing a problem, instead of being able to just directly search for the (truncated) offending commit hash on the closed MR overview page.