Handle KeyboardInterrupt

[dacevedo12]

When canceling the execution of a job via ^C a traceback is shown

^CTraceback (most recent call last):
  File "/nix/store/p729krh0vah22znzj4zrlyg7ivyhqvqk-src/src/cli/main/__main__.py", line 11, in <module>
    main(sys.argv)
  File "/nix/store/p729krh0vah22znzj4zrlyg7ivyhqvqk-src/src/cli/main/cli.py", line 769, in main
    cli(args)
  File "/nix/store/p729krh0vah22znzj4zrlyg7ivyhqvqk-src/src/cli/main/cli.py", line 572, in cli
    code = _cli_build(attr, config, head, out, src)
  File "/nix/store/p729krh0vah22znzj4zrlyg7ivyhqvqk-src/src/cli/main/cli.py", line 615, in _cli_build
    code = _run(
  File "/nix/store/p729krh0vah22znzj4zrlyg7ivyhqvqk-src/src/cli/main/cli.py", line 468, in _run
    return process.wait()
  File "/nix/store/xf1k5k05vg3zn7dfcpfh1qa7ga48hi3m-python3-3.10.6/lib/python3.10/subprocess.py", line 1207, in wait
    return self._wait(timeout=timeout)
  File "/nix/store/xf1k5k05vg3zn7dfcpfh1qa7ga48hi3m-python3-3.10.6/lib/python3.10/subprocess.py", line 1941, in _wait
    (pid, sts) = self._try_wait(0)
  File "/nix/store/xf1k5k05vg3zn7dfcpfh1qa7ga48hi3m-python3-3.10.6/lib/python3.10/subprocess.py", line 1899, in _try_wait
    (pid, sts) = os.waitpid(self.pid, wait_flags)
KeyboardInterrupt
/nix/store/xf1k5k05vg3zn7dfcpfh1qa7ga48hi3m-python3-3.10.6/lib/python3.10/subprocess.py:1070: ResourceWarning: subprocess 48781 is still running
  _warn("subprocess %s is still running" % self.pid,
ResourceWarning: Enable tracemalloc to get the object allocation traceback

It leaves one wondering if there's a bug or if the underlying process actually stopped