* filesystem.py: fix xfs growfs
xfs needs to be mounted to be expanted.
Add function to get mountpoint of filesystem.
* Fail if xfs filesystem is not mounted
xfs growfs needs to be executed on a mountpoint. That will be enforced
now by xfsprogs-4.12.
https://bugzilla.redhat.com/show_bug.cgi?id=1477192
* Update changelogs/fragments/33979-xfs_growfs.yml
Co-authored-by: Felix Fontein <felix@fontein.de>
Co-authored-by: Felix Fontein <felix@fontein.de>
