Reduce label spam for loki

infra/jobs/station/logging.levant.nomad

@@ -108,6 +108,12 @@ healthchecks.require_healthy = true
     del(.label)
     del(.ts)
     del(.msg)
+
+    # labels from the docker_logs source that will vary way too much
+    del(.container_id)
+    del(.container_created_at)
+    del(.container_name)
+    del(.host)
   '''
 
 [sinks.loki]