Merge PR #33981 into octopus

* refs/pull/33981/head:
	doc/install: edits
	doc/cephadm: more edits
	doc/cephadm/install: edits
	doc/cephadm/adoption: improvements
	doc/cephadm/install: a few edits
	doc/cephadm/install: do not install ceph-common on host (by default)
	doc/cephadm: drop os recs link
	doc/cephadm/upgrade: improvements
	doc/cephadm/upgrade: document upgrade
	doc/cephadm/install: revamp install docs
	doc: reorganize cephadm docs
	doc/cephadm/administration: update docs on customizing SSH config
	doc/cephadm/administration: add a note about the 'removed' dir

Reviewed-by: Sebastian Wagner <swagner@suse.com>