Merge branch 'js/run-command-close-packs'

The run-command API has been updated so that the callers can easily
ask the file descriptors open for packfiles to be closed immediately
before spawning commands that may trigger auto-gc.

* js/run-command-close-packs:
  Close object store closer to spawning child processes
  run_auto_maintenance(): implicitly close the object store
  run-command: offer to close the object store before running
  run-command: prettify the `RUN_COMMAND_*` flags
  pull: release packs before fetching
  commit-graph: when closing the graph, also release the slab

commit-graph.c

@@ -713,6 +713,7 @@ static void close_commit_graph_one(struct commit_graph *g)
 	if (!g)
 		return;
 
+	clear_commit_graph_data_slab(&commit_graph_data_slab);
 	close_commit_graph_one(g->base_graph);
 	free_commit_graph(g);
 }