LU-15994 tests: add testing for io_uring via fio

LU-15994 tests: add testing for io_uring via fio

This patch adds test case for io_uring I/O engine via fio.

Test-Parameters: trivial testlist=sanity
Signed-off-by: Qian Yingjin <qian@ddn.com>
Change-Id: I0f2e371f91c02dc76644f42e5d1055ec200597c6
Reviewed-on: https://review.whamcloud.com/48167
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>