iotests/common.filter: Sort keep_data_file

Sort the new keep_data_file creation option together with data_file and
data_file_raw.

Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-ID: <20250530084448.192369-4-hreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/common.filter

@@ -182,7 +182,7 @@ _do_filter_img_create()
             -e 's/^\(fmt\)/0-\1/' \
             -e 's/^\(size\)/1-\1/' \
             -e 's/^\(backing\)/2-\1/' \
-            -e 's/^\(data_file\)/3-\1/' \
+            -e 's/^\(\(keep_\)\?data_file\)/3-\1/' \
             -e 's/^\(encryption\)/4-\1/' \
             -e 's/^\(preallocation\)/8-\1/' \
         | LC_ALL=C sort \