[WIP] feat: add drupal 11 workflow testing

[millnut]

What does this change?

Update the workflow testing to support D11. This means we test

• Drupal 10
  • localgov project 3.x (patched for D10 and D11)
  • PHP 8.1, 8.2, 8.3, 8.4
• Drupal 11
  • localgov project 3.x (patched for D10 and D11)
  • PHP 8.3, 8.4

Coding standards and PHPstan we can update once Drupal 10 support for PHP 8.4 is released, due in Drupal 10.4.x

[millnut]

Added an example here @stephen-cox https://github.com/localgovdrupal/localgov_alert_banner/actions/runs/12301561123/job/34332421512

For the project we'd need 3.x for D10 and 4.x for D11 due to package differences and PHP version support.

localgov profile we could get away with having the 3.x branch support both Drupal 10 and 11.

After that, I can update the workflow.

[millnut]

This is a temporary workaround until the localgov profile supports D11

[millnut]

@stephen-cox I had a little break between cooking Christmas dinner, so I've done some more work here and both D10 and D11 install and run without failures https://github.com/localgovdrupal/localgov_alert_banner/actions/runs/12483172646.

I've created a bunch of in-progress PRs for D11 which you'll see in the composer require.

The only failures on this module are from the PHPUnit side related to PHP 8.4 and a library drupal/diff uses, which we use in localgov_workflows so it must trigger on the test setup and are unrelated to this actual module.

There are still some other contrib modules that do not yet have Drupal 11 compliant releases e.g. image widget crop, font awesome, etc...

Update: I've added a patch to the D11 support branch in the project to fix the PHP 8.4 errors, it's on my repo now but I've submitted a PR upstream as well (caxy/php-htmldiff#130) but we are showing green now (apart from eslint and stylelint)