Create 2 way IPC connection between agent and task

[tevoinea]

Summary of the Pull Request

What is this about?

Closes #2769
Closes #2768

Creates a 2 way communication channel between the onefuzz-agent and the onefuzz-task binaries.

Info on Pull Request

What does this include?

• When the agent starts a task, it includes paths for the task to connect 2 IPC channels:
  • agent -> task
  • task -> agent
• Each task invocation will bootstrap a separate set of channels so the collocated task scenario is supported
• The agent waits up to 30 seconds for the task to complete the IPC channel bootstrap
• When it comes time to shutdown, the task has 90 seconds to terminate after the shutdown message is sent, otherwise we kill it

Validation Steps Performed

How does someone test & validate?

• Updated tests and tested locally using unmanaged nodes feature

[codecov-commenter]

Codecov Report

Merging #2886 (6f68ede) into main (8a7a0b0) will increase coverage by 0.15%.
The diff coverage is 56.74%.

@@            Coverage Diff             @@
##             main    #2886      +/-   ##
==========================================
+ Coverage   28.06%   28.22%   +0.15%     
==========================================
  Files         302      303       +1     
  Lines       35811    36013     +202     
==========================================
+ Hits        10050    10164     +114     
- Misses      25761    25849      +88     

Impacted Files	Coverage Δ
src/agent/onefuzz-agent/src/scheduler.rs	53.80% <0.00%> (ø)
src/agent/onefuzz-task/src/local/common.rs	0.00% <0.00%> (ø)
src/agent/onefuzz-task/src/managed/cmd.rs	0.00% <0.00%> (ø)
src/agent/onefuzz-task/src/tasks/config.rs	0.00% <ø> (ø)
src/agent/onefuzz-task/src/tasks/fuzz/generator.rs	0.00% <0.00%> (ø)
...rc/agent/onefuzz-task/src/tasks/fuzz/supervisor.rs	0.00% <0.00%> (ø)
src/agent/onefuzz/src/lib.rs	100.00% <ø> (ø)
src/agent/onefuzz-agent/src/worker.rs	55.14% <52.63%> (-1.62%)	⬇️
src/agent/onefuzz-agent/src/worker/double.rs	86.36% <70.00%> (-13.64%)	⬇️
src/agent/onefuzz-agent/src/worker/tests.rs	95.78% <84.81%> (-3.45%)	⬇️
... and 3 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.