Create Maps API Key with Terraform

[cmorabito-woolpert]

API Keys can now be managed with Terraform via API Keys API. This could eliminate the need to manually create an API Key during project setup.

Reference: https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/apikeys_key

• Enable API Keys API (apikeys.googleapis.com)
• Define a new google_apikeys_key resource
  • Restrict the key's api_targets to the following:
    • Geocoding API
    • Maps JavaScript API
    • Places API
    • Static Maps API
  • Do not set any other restrictions
• Store the key_string output value in the existing maps_api_key secret

After defining an google_apikeys_key resource:

• Remove the manual "Create a Google Maps API Key" step in Project Setup doc
• Remove the maps_api_key input variable from Terraform and Deployment doc
• Include upgrade note that after deploying this version, users can delete their previous manually-created key