Add revision log message when node translation has been deleted.

I've moved changes from #2 into a pull request, along with some enhancements.

First, we need to verify whether the entity implements the RevisionLogInterface, and if so, use the common message instead of creating a unique one.

Currently, I'm uncertain about the necessity for test coverage, as I am not very familiar with Drupal tests. Nevertheless, I'm adding the 'tests' tag as a precaution. I hope someone can assist with this.

pooja saraah → made their first commit to this issue’s fork.

Applied MR !6105 but not able to to any changes after applied.

Steps to reproduce
1) Add a new language to the site.
2) Create a node.
3) Translate the node to a different language.
4) Try to delete the translation.

moving NW

I've discovered that the revisionOverview function in the NodeController doesn't provide an opportunity to display revision messages in the list, due to the following condition:

if ($revision->hasTranslation($langcode) && $revision->getTranslation($langcode)->isRevisionTranslationAffected()) {

This raises a question: is this logic necessary at all? I need another opinion to confirm my thoughts.