SAK-43666 Files over 2G have incorrect file size (#8232)
Switch from Spring FileCopyUtils which returns an int to
commons-io IOUtils.copyLarge which returns long for file length,
to avoid getting an incorrect content length when uploading files
larger than 2G.
(cherry picked from commit a76d21fa67ed34420955b4938f8f5ebadff8e26a)