Merge PR #56429 into main

* refs/pull/56429/head:
	mds: fix rank root doesn't insert root ino into its subtree map when starting
	mds: flush mds log before finishing STATE_STARTING
	mds/FSMap: go back to STARTING state when rank doesn't make it pass STARTING

Reviewed-by: Venky Shankar <vshankar@redhat.com>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>

diff --cc src/mds/FSMap.cc
Simple merge

diff --cc src/mds/MDCache.cc
Simple merge

diff --cc src/mds/MDSRank.cc
Simple merge