io_uring: trace task_work_run

trace task_work_run to help provide stats on how often task work is run
and what batch sizes are coming through.

Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220622134028.2013417-9-dylany@fb.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>