ioengines: clean up latency accounting for 3 ioengines

ioengines: clean up latency accounting for 3 ioengines

The librpma_apm_client, librpma_gpspm_client, and rdma ioengines have
commit functions that record submission latency. In order to avoid
setting issue_time twice add the FIO_ASYNCIO_SETS_ISSUE_TIME flag. Also
add code to update the iolog issue time when needed.

I don't have the means to test this patch.

Signed-off-by: Vincent Fu <vincent.fu@samsung.com>
Link: https://lore.kernel.org/r/20220614155822.307771-6-vincent.fu@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>