xfs,iomap: move delalloc punching to iomap

mainline inclusion
from mainline-v6.1-rc4
commit 9c7babf9
category: bugfix
bugzilla: 189079, https://gitee.com/openeuler/kernel/issues/I76JSK
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9c7babf94a0d686b552e53aded8d4703d1b8b92b



--------------------------------

Because that's what Christoph wants for this error handling path
only XFS uses.

It requires a new iomap export for handling errors over delalloc
ranges. This is basically the XFS code as is stands, but even though
Christoph wants this as iomap funcitonality, we still have
to call it from the filesystem specific ->iomap_end callback, and
call into the iomap code with yet another filesystem specific
callback to punch the delalloc extent within the defined ranges.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Long Li <leo.lilong@huawei.com>

Conflicts:
	fs/xfs/xfs_iomap.c
	fs/iomap/buffered-io.c
	include/linux/iomap.h