Limit the accessible domain path settings to the active domain

[stephen-cox]

What does this change?

Hides the path settings for all the domains apart from the active one.

How to test

When editing a page on a site you should only be able to see path settings for the site you're on.

When creating a new node the generate automatic URL checkbox should be checked.

Fixes #509

[stephen-cox]

I have run out of time today to add tests to this. As I thought I had fixed this, but can't see any sign of that, I think it would be worth adding a test to ensure it keeps working.

[finnlewis]

Tested locally and it works a treat, thanks @stephen-cox !

Do we want to write some tests before merging?

[millnut]

Looks like the failed tests here and other PRs mentioned today are unrelated as we get them on the main project from this morning's run https://github.com/localgovdrupal/localgov_microsites_project/actions/runs/11454313013/job/31868361713 looks like something needs updating in the group_sites module.

Looks to have started on this run (19th Oct) https://github.com/localgovdrupal/localgov_microsites_project/actions/runs/11415200204

[finnlewis]

Follow up issue to create tests #516