Add route to react on KC user deletes

New commit on 3470408-add-kc-user-delete-route topic branch, and related new MR !279

89da64f8 Add route to process keycloak user delete event relay

Then, add it to a new drupalorg_keycloak_events_user_delete queue if it
is valid.

Finally, on queue processing, query KC one more time, and only remove
the user from Drupal if the user on KC does not really exist.

A more general version is now available on the topic branch.

New commits on 3470408-add-kc-user-delete-route topic branch, and related MR !279

- (rebased) 6b48c191 Add route to process keycloak user delete event relay
- 05d45550 Avoid full HTML response
- 739889ab Skip processing the queue if not enough data is present
- 78d42933 Refactor endpoint for Keycloak to be more generic

Looks all good, merged! With the beanstalkd setup complete, I think we can call this fixed.

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