Mark io_uring completion event as consumed
# DESCRIPTION
The [io_uring_cqe_seen] function marks the IO completion *cqe*
belonging to the *ring* param as consumed.
After the caller has submitted a request with [io_uring_submit],
the application can retrieve the completion with
[io_uring_wait_cqe], [io_uring_peek_cqe], or any of the other
CQE retrieval helpers, and mark it as consumed with
[io_uring_cqe_seen].
Completions must be marked as completed so their slot can get reused.
# RETURN VALUE
None
# SEE ALSO
[io_uring_submit], [io_uring_peek_cqe],
[io_uring_wait_cqe], [io_uring_wait_cqes],
[io_uring_wait_cqe_timeout]