Update git submodules

* Update plugins/delete-project from branch 'stable-3.8'
  to 38b4cb16483045557ffbe7dec8c3d971b95ebc82
  - Send Project Deleted Events also when archiving
    
    When projects are either deleted fully, or preserved by setting as
    hidden and moving to f.i. Deleted-Projects, we send a Project Deleted
    Event. We do not do the same if we archive the repository, even though
    this is effectively also a deleted project (more so than hidden is) from
    a Gerrit perspective.
    
    Not sending this event means that archived repositories are not properly
    removed from replicas when replicateRepositoryDeletions is set.
    
    This makes sure that we still send the projectDeletionEvent while
    archiving is set.
    
    Release-Notes: Plugin Delete-Project archiveDeletedRepos option now also emits a Project Deletion event.
    Change-Id: I0829a1a2016d67ac789b92f67d1d7c6a13b65c65