Merge PR #30365 into master

Merge PR #30365 into master

* refs/pull/30365/head:
	cephfs-shell: get rid of "return" at the end of the method
	pybind/cephfs.pyx: add NotDirectory exception
	cephfs-shell: don't expect both Error and OSEror together
	cephfs-shell: print built-in error messages for exceptions
	cephfs-shell: use poutput defined with the module
	cephfs-shell: use perror() defined within the module
	cephfs-shell: don't pass default values in calls to perror
	cephfs-shell: align perror's signature with cmd2.Cmd.perror
	pybind/cephfs: make actual error message part of strerror of OSError

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>
Reviewed-by: Varsha Rao <varao@redhat.com>