WIP: lock-free work stealing deque based on our stack.

4 jobs from lock_free_task_stack in 3 minutes 37 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #2896
build_cmake

00:45

 
  Test
passed #2897
run_tests

00:40

 
  Sanitizer
passed #2899
run_address_sanitizer

01:18

passed #2898
run_thread_sanitizer

00:54