Support FieldFormatter PHP attributes in Drupal 10.3

The new branch 2.2.x was created with the corresponding release:
image_link_formatter 2.2.x-dev →

The changes in ticket's issue fork also seem to be passing the tests, so switching version over to 2.2.x to prepare a merge request.

The initial tests above at #4 were failing at the composer step because the module was being tested with Drupal 10.2.x, which is a dropped requirement in this new branch's composer.json.

This could be a common use case, probably encountered by other module maintainers, when a new development branch drops compatibility for the currently supported version, to start working on supporting the next ones..

Therefore, for the 2.2.x branch, the .gitlab-ci.yml file had to be updated to add a conditional case to skip to the next minor version:

# Image Link Formatter: Pipeline configuration variables.
workflow:
  rules:
    # Allow automated Tests Build Pipelines to run with the next minor version:
    # Drop support for '10.2.x'.
    - if: $CORE_SUPPORTED == "10.2.x-dev"
      variables:
        _TARGET_CORE: $CORE_NEXT_MINOR

Once 10.3.x-dev becomes the $CORE_SUPPORTED version, then we should be able to remove this piece of code and probably start creating a recommended release.
 

Otherwise everything else is mostly based on the links, resources and suggestions from the issue summary.

All the changes have been merged at #5 in the new development release: image_link_formatter 2.2.x-dev → .

At this point, all the work to be carried in this ticket should have been completed, thus marking it as Fixed for now.

Feel free to let us know if you have any questions, concerns or suggestions on any of the recent code changes or the new development branch, we would surely be glad to hear your feedback.
Thanks in advance !

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