Merge PR #33674 into master

* refs/pull/33674/head:
	mgr/volumes: OpSmException.error -> OpSmException.errno
	mgr/volumes: remove unneeded assignment to `NoneType`
	mgr/volumes: add missing OpSmException import
	mgr/volumes: add missing error code
	mgr/volumes: remove stray return
	mgr/volumes: fixup format string args
	mgr/volumes: add missing `mgr` param
	mgr/volumes: assert self.fs
	mgr/volumes: skip type checking on RTimer class
	mgr/volumes: fixup threading.Timer import
	mgr/volumes: fix positional str formatting
	mgr/volumes: place getters and setters next to each other
	mgr/volumes: reverse params passed to `isinstace()`
	mgr/volumes: fix arg typo '.' -> ','
	mgr/volumes: add `deque` type
	mgr/volumes: `threading.Event.isSet` no longer exists in py3
	mgr/volumes: assert JobThread class
	mgr/volumes: import VolumeException
	mgr/volumes: use `SafeConfigParser` with py2
	mgr/volumes: use python version during configparser import
	mgr/volumes: add `Dict` type
	mgr/volumes: import errno
	mgr/volumes: add `mgr/volumes` to the mypy checks

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>
Reviewed-by: Venky Shankar <vshankar@redhat.com>
Reviewed-by: Ramana Raja <rraja@redhat.com>