Use helpers to speed up compliance runs

[binamov]

We use helpers such as https://github.com/GoogleCloudPlatform/inspec-gcp-cis-benchmark/blob/master/libraries/gcp_helpers.rb in our downstream profiles to speed up assessments.

Can we consider moving them upstream to inspec-gcp as per https://github.com/GoogleCloudPlatform/inspec-gcp-pci-profile/issues/6 ?

Context

Those helpers allow us to slightly shorten the time of inspec runs against GCP.

Possible Implementation

Make helpers native to inspec-gcp

[KonradSchieban]

Can close this issue. Helpers have been moved to https://github.com/GoogleCloudPlatform/inspec-gcp-helpers