google_compute_backend_bucket: Add support for cacheKeyPolicy

[genkami]

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Description

Google Cloud has provided a feature to include query strings and/or HTTP headers into a Cloud CDN cache key, and recently it has become GA.
It might be useful if these parameters can be configured via Terraform.

New or Affected Resource(s)

• google_compute_backend_bucket

Potential Terraform Configuration

resource "google_compute_backend_bucket" "some_backend" {
  name        = "some-backend-bucket"
  bucket_name = "..."
  enable_cdn  = true
  cdn_policy {
    cache_key_policy {
        query_string_white_list = [ ... ]
        include_http_headers = [ ... ]
    }
  }
}

References

• #0000

[github-actions]

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