Kitchen Google driver version bump to 2.4.0

[estedev]

Describe the Enhancement:

The current Kitchen Google driver version in Chef Workstation is 2.3.0. This request is to get it bumped up to 2.4.0.

Describe the Need:

The 2.4.0 version of the Kitchen Google driver adds support for accelerator(s), eg. GPU.

driver:
  name: gce
  ...
  machine_type: n1-standard-4
  guest_accelerators:
    - type: nvidia-tesla-t4
       count: 2

Current Alternative

Manually bumping the kitchen-google gem would be the current alternative.

Can We Help You Implement This?:

I'm happy to update the Gemfile.lock myself in a PR if that is the desired approach/helpful at all (not sure whether there's a monthly bump that happens anyway by the maintainers)...

Thanks in advance for your feedback!