Merge PR #41509 into master

Merge PR #41509 into master

* refs/pull/41509/head:
	common/cmdparse: fix CephBool validation for tell commands
	mgr/nfs: fix 'nfs export create' argument order
	common/cmdparse: emit proper json
	mon/MonCommands: add -- seperator to example
	qa/tasks/cephfs/test_nfs: fix export create test
	mgr: make mgr commands compat with pre-quincy mon
	doc/_ext/ceph_commands: handle non-positional args in docs
	mgr: fix reweight-by-utilization cephbool flag
	mon/MonCommands: convert some CephChoices to CephBool
	mgr/k8sevents: fix help strings
	pybind/mgr/mgr_module: fix help desc formatting
	mgr/orchestrator: clean up 'orch {daemon add,apply} rgw' args
	mgr/orchestrator: add end_positional to a few methods
	mgr/orchestrator: reformat a few methods
	pybind/ceph_argparse: stop parsing when we run out of positional args
	pybind/ceph_argparse: remove dead code
	pybind/mgr/mgr_module: infer non-positional args
	pybind/mgr/mgr_module: add separator for non-positional args
	command/cmdparse: use -- to separate positional from non-positional args
	pybind/ceph_argparse: adjust help text for non-positional args
	pybind/ceph_argparse: track a 'positional' property on cli args

Reviewed-by: Kefu Chai <kchai@redhat.com>