Implements group query for provisioning runners via google cloud

What does this MR do and why?

Dependent on !146107 (merged) merging first.

Implements group query for provisioning runners via Google Cloud

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

How to set up and validate locally

1. Simulate a SaaS instance in your GDK
2. Enable the feature flag

 echo "Feature.enable(:google_cloud_runner_provisioning)" | rails c

1. Visit group/project runner creation views
2. Select google cloud radio option (for platform)
3. Create runner
4. New options should show for register view if you chose the google cloud platform option
5. Existing runner options should still show for other platform selections
6. Fill the form values with the following:

    "Google cloud project ID": "dev-gcp-s3c-integrati-9abafed1",
    "region": "us-central1",
    "zone": "us-central1-a",

1. Click the Show instructions button and you should be able to see the instructions

Related to #443855 (closed)