Implement PG scrub runner

src/osd_peering_pg.cpp

@@ -463,7 +463,7 @@ void pg_t::calc_object_states(int log_level)
 void pg_t::print_state()
 {
     printf(
-        "[PG %u/%u] is %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s (%lu objects)\n", pool_id, pg_num,
+        "[PG %u/%u] is %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s (%lu objects)\n", pool_id, pg_num,
         (state & PG_STARTING) ? "starting" : "",
         (state & PG_OFFLINE) ? "offline" : "",
         (state & PG_PEERING) ? "peering" : "",
@@ -479,6 +479,7 @@ void pg_t::print_state()
         (state & PG_HAS_UNCLEAN) ? " + has_unclean" : "",
         (state & PG_HAS_INVALID) ? " + has_invalid" : "",
         (state & PG_LEFT_ON_DEAD) ? " + left_on_dead" : "",
+        (state & PG_SCRUBBING) ? " + scrubbing" : "",
         total_count
     );
 }