Merge PR #41219 into pacific

* refs/pull/41219/head:
	mgr/cephadm: misc. autopep8 changes
	mgr/cephadm: add timeout when removing iscsi gateway.conf
	mgr/cephadm: mock subprocess calls in tests that remove iscsi daemons
	qa/tasks/cephadm_cases: longer wait for osd to start
	mgr/cephadm: apply hostname/addr checks to 'orch host set-addr' too
	mgr/cephadm: make 'host add' idempotent
	mgr/cephadm: set host crush location based on HostSpec
	python-common: add location property to HostSpec, + tests
	doc/cephadm: rewriting "starting the upgrade"
	doc/cephadm: rewrite "monitoring the upgrade"
	doc/cephadm: rewrite "cancelling the upgrade"
	doc/cephadm: rewrite "potential problems"
	doc/cephadm: rewrite "using customized con..."
	Add Rocky Linux to supported DISTRO_NAMES
	mgr/cephadm: remove haproxy+keepalived container image from service spec
	mgr/cephadm:  extend disk selector test which disk size may be decimal
	mgr/cephadm: When device size contains the decimal, it can not match size exactly.
	mgr/dashboard: fix HAProxy (now called ingress)
	mgr/cephadm: Purge iscsi configuration from pool and ceph config

Reviewed-by: Laura Paduano <lpaduano@suse.com>
Reviewed-by: Michael Fritch <mfritch@suse.com>