Merge PR #24502 into master

* refs/pull/24502/head:
	crushtool: implement --rebuild-class-roots command
	crushtool: make --reweight re-sum choose_args weight-sets too
	crushtool: --reweight should only reweight nonshadow roots
	crush/CrushWrapper: reclassify: use default parent for created buckets
	crush/CrushWrapper: reclassify: handle to-be-created buckets that we need twice
	test/cli/crushtool/reclassify: add second gabe test case
	crushtool: add --set-subtree-class; do not set class via --reclassify-root
	test/cli/crushtool/reclassify: add reclassify test cases
	doc/rados/operations/crush*: document reclassify
	doc/rados/operations/crush: remove instructions for separate crush trees for ssd
	crushtool: add --compare command
	crushtool: implement --reclassify
	crush/CrushCompiler: fix id scan to include class ids

Reviewed-by: Josh Durgin <jdurgin@redhat.com>

diff --cc doc/rados/operations/crush-map-edits.rst
Simple merge

diff --cc src/crush/CrushWrapper.cc
Simple merge

diff --cc src/crush/CrushWrapper.h
Simple merge