test/poll-cancel-all: test IORING_ASYNC_CANCEL_ANY
test/poll-cancel-all: test IORING_ASYNC_CANCEL_ANY

_ANY will match any request, no keys needed. Allows canceling any
request on the ring.

Signed-off-by: Jens Axboe <cd8c6775e60d6f67a6984377324e5290df3d5358@kernel.dk>

axboe/liburing,axboe/liburing,axboe/liburing