Merge PR #27141 into master

* refs/pull/27141/head:
	mon/OSDMonitor: fix osd boot feature vs require_osd_release check
	include/ceph_features: retire 7 other old features
	include/ceph_features: retire ERASURE_CODE_PLUGINS_V2
	include/ceph_features: retire OSD_ERASURE_CODES
	include/ceph_features: update comment to align with N+2 upgrades
	include/ceph_features: adjust whitespace for retired and now usable features
	mon: remove check for jewel mons
	mds/FSMap: remove support for encoding jewel FSMap
	include/ceph_features: enable SERVER_OCTOPUS
	test/cli/osdmaptool/feature-set-unset-list: add octopus to output
	test/cli/osdmaptool/feature-set-unset-list: change unknown feature bit
	qa/releases/octopus.yaml: add octopus upgrade final step
	osd/OSDMap: octopus encoding features
	mon/OSDMonitor: add mon_debug_no_require_octopus
	mon/OSDMonitor: allow 'osd require-osd-release octopus'
	mon: add ondisk incompat octopus feature
	mon/mon_types: add mon feature for octopus
	include/ceph_features: SERVER_O -> SERVER_OCTOPUS

Reviewed-by: Neha Ojha <nojha@redhat.com>

diff --cc src/common/options.cc
Simple merge

diff --cc src/mon/MonCommands.h
Simple merge

diff --cc src/mon/Monitor.cc
Simple merge

diff --cc src/mon/mon_types.h
Simple merge

diff --cc src/osd/OSDMap.cc
Simple merge