Allow to configure label visibility in entity display settings

While developing this functionality, my primary goal was to avoid creating something new with plugins and implement it as simply as possible. Therefore, a significant portion was described within a hook.

In my opinion, the label configuration could be moved to a plugin, but this would require creating an instance, which might impact performance (though it might not).

I also updated the GitLab CI configuration to enable testing on Drupal 10, as the extra_field module does not yet have a version compatible with Drupal 11 - see If what you want is to run linting and tests under Drupal 10 💬 Disabling OPT_IN_TEST_CURRENT not working Active