Issue #3619691: Add Drupal 12 compatibility

Boris Doesborgrequested to merge
issue/path_file-3619691:3619691-d12 into 2.2.x
  • Set core_version_requirement to ^11.3 || ^12.
  • Require drupal/core ^11.3 || ^12 in composer.json.
  • Add #[RunTestsInSeparateProcesses] to Kernel and Functional tests, required by Drupal 12.

Closes #3619691

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