By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Description

• Graph report didn't use the same function to extract tags as the regular report, fixed that.
• The function to generate tags took into account resource names with "gcp" rather than with "google", so I added support for it as well.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes