Port entity reference widget autocomplete settings to link field widget

The patch is attached to add Matching settings, not only limit but also operator, the same as for entity autocomplete. The settings are only available in the widget settings when Link field instance supports internal links. By default limit is 10 and operator is "CONTAINS", for BC reasons. There is also an update hook done in the same way as system module did for autocomplete (see related issue).

Remove unused variable from post update that was breaking the tests.

The last submitted patch, 4: 3341689-link-match-settings-4.patch, failed testing. View results →

Fix hook name, I will check the failing tests a bit later

This will need test coverage and an upgrade path tests for the schema changes.
Will need change record
New functions should be typhinted
@trigger_error() should follow pattern from other examples in core.
Also not sure using a hook here is the best but don't have any examples right now

DIdn't test the update hook

The update hook is done in the same way as here https://www.drupal.org/project/drupal/issues/2863188 → , the same change, but for entity reference autocomplete widget.

That was 8.8 some different coding standards have been implemented since then.

Maybe this issue should be closed in favor of this one https://www.drupal.org/project/drupal/issues/3373258 ✨ Allow to select reference method in link field type for internal links RTBC because the last patch includes functionality from this issue.

If the other solves the problem then we should. Will leave the call to you though since you worked on both.

The other ticket is on my list.

Fixed in the referenced issue https://www.drupal.org/project/drupal/issues/3373258 ✨ Allow to select reference method in link field type for internal links RTBC

Automatically closed - issue fixed for 2 weeks with no activity.

@a.dmitriiev, thanks.

This issue is really a duplicate (nothing was fixed here) so I changing the status.