[IO] only try syscall on Future::submit if it has no dependencies

13 jobs for worker_exclusive_uring_no_partial_completion in 9 minutes and 57 seconds (queued for 1 second)
latest
Status Name Job ID Coverage
  Smoke Test
passed smoke-test #288799

00:07:38

 
  Test
passed test-clang #288803

00:01:49

passed test-clang-debug #288805

00:01:40

passed test-clang-release #288804

00:00:17

passed test-clang-sanitizer-undefined #288809

00:00:59

passed test-gcc #288800

00:02:18

passed test-gcc-debug #288802

00:01:31

passed test-gcc-release #288801

00:00:30

passed test-laws #288810

00:01:14

passed test-laws-release #288811

00:01:39

passed test-with-stats #288807

00:01:50

passed test-with-userspace-rcu #288808

00:02:08

passed test-worker-no-sleep #288806

00:01:22