Add "Machine name" column in field_ui to align with latest core

The change seems simple, but the conditionality is more tricky.

We should have some kind of feature detection support in core.

This patch is a first proof of concept, definitely not to be committed as-is.
It lacks the conditionality, and it lacks tests.

It is ok for people who want to patch both core and field_group to get the machine name column.

Nice @donquixote! :) Can you please turn this into a MR?

@anybody There you go.
Now ✨ Show machine name in "Manage form display" and "Manage display" table row Fixed has been released. This causes an issue where the weight field for the field_group line is displayed. Dragging the field_group around is still functional but it can be troubling for end users.

The fix will need to be smarter. As the column only exists for 11.1. We don't want to break the screens of sites running an older version.

I don't know why I was convinced that 4.X was D11 only. My bad.
Is it better like this?

I would suggest to use some kind of feature detection instead of version detection.
This way we also support sites that apply a patch.
Not sure yet how that would work..

Not the cleanest as there is no array key, but would this be okay?

The solution is looking good for me! Thanks @scott_euser

I've tried the patch https://www.drupal.org/project/field_group/issues/3471822#comment-15755143 📌 Add "Machine name" column in field_ui to align with latest core Active and it works for me (using Drupal 11.1.5 and Firefox 136.0)