don't migrate replicated VM whose replication job is marked for removal

don't migrate replicated VM whose replication job is marked for removal

while it didn't actually fail, we probably want to avoid the behavior:

With remove_job=full:
    * run_replication called during migration causes the replicated volumes to
      be removed
    * migration continues by fully copying all volumes

With remove_job=local:
    * run_replication called during migration causes the job (and local
      replication snapshots) to be removed
    * migration continues by fully copying all volumes and renaming them to
      avoid collision with the still existing remote volumes

Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>