Implement object oriented hooks

Worth noting, we found an issue with eca_config_schema_info_alter() not firing when the eca_config module was enabled. I was able to work around this by using an OOP hook.

See 📌 Config validation for ECA models Active

Thanks @michaellander for the additional info. I think, though, that we will not switch to OOP hooks with ECA 2.1 because that version also supports Drupal 10.3 and then things would be broken. We will wait for ECA 3.x which will eventually support ^11.4 || ^12 of Drupal core. Note: 11.4 as the lowest version I've just made up, it's not clear yet which 11 release will be the one that won't see too many breaking changes before Drupal 12.

I've worked on implementing object oriented hooks and the Backwards-compatible Hook implementation for Drupal versions from 10.1 to 11.0 according to https://www.drupal.org/node/3442349 →