Update TF examples to be more comprehensive

[mitch-hamm]

We're currently missing examples for more complicated CloudEnvironment configurations.
We should include basic but also more advanced configs like configuring the default gateway

[ciiiii]

We also need example like

• how vendor access module work with these cloud resources
  • dependency logic
  • manage AWS/GCP/Azure vendor access module with CloudConnections
  • Azure special case: sn-cloud-manager per conn, vendor-access per env
• how to manage multiple envs with different isolation level
  • dev, prod in different org, and bound to different accounts
  • dev, prod in same org, and bound to different accounts
  • dev, prod in same org, and bound to same accounts