Return the clone bio embedded into the tio as that is what the callers
actually want.  Similar for the free side.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NMike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20220202160109.108149-8-hch@lst.deSigned-off-by: NJens Axboe <axboe@kernel.dk>