xfs, iomap: unshare range fixes

Brian Fosterrequested to merge
bfoster2/centos-stream-9:RHEL-64959-xfs-iomap-unshare-range-fixes into main

JIRA: https://issues.redhat.com/browse/RHEL-64959
Tested: via fstests.

Signed-off-by: Brian Foster bfoster@redhat.com

Merge request reports