Update multi-regional GCP resources for missing attributes/continents

[vdmgolub]

A user performed some investigation in #2752 and found several resources with missing attributes/continents support:

Artifact Registry

• Africa continent missing in network traffic calculation

BigQuery

• Missing support for location argument

BigQuery Dataset

• Multi-region not supported

BigQuery Table

• Multi-region not supported for multiple cost components
• Potential incorrect region attribution due to r.mapRegion()
• Storage read API appears to not support regions correctly (judgement based on non regexed attribute filter)

Cloudfunctions

• Missing 2nd gen support

Compute Image

• Missing support for storage_locations argument

Compute Snapshot

• Missing support for storage_locations argument

As far as the testing region goes, it seems that usually the newer ones get special treatment, but that is not a guarantee. I'd suggest testing at least one region from every continent, as well as multi regional resources. Additionally, I suggest testing at least one non-provider default region, they aren't always attributed correctly due to non region arguments in resources.