Merge PR #58936 into main

Merge PR #58936 into main

* refs/pull/58936/head:
	mds: do not duplicate journaler write heads
	mds: use Journaler getters
	osdc: properly acquire locks for getters
	osdc: add print method for Journaler::Header
	mds: do not trim segments after open file table commit
	mds: delay expiry if LogSegment is ahead of committed oft seq
	mds: do not write journal head twice on trim
	mds: simplify and explain expiry finisher ctx
	mds: add mds_lock asserts for journal flush
	mds: skip second wait_for_safe
	mds: trim only to the LogSegment created for flush
	mds: allow passing explicit seq to trim to
	mds: quiet unhelpful debug message
	mds: add C_IO_Wrapper completion debugging
	mds: add dout for new segment

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