Add better example queries to gcp_tag_binding table

[misraved]

Is your feature request related to a problem? Please describe.
The gcp_tag_binding table currently doesn't include good example queries to show how it can be used to get the tags on GCP resources.

Describe the solution you'd like
The gcp_tag_binding table doc should include better example queries.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.