provider/google/storage: support for bucket CORS policy

[renchap]

There is currently no way to set a Google Cloud Storage CORS policy on a bucket.

It is set using the cors[] attribute on a Bucket object: https://cloud.google.com/storage/docs/json_api/v1/buckets

Implementation could be similar to the AWS S3 Bucket resource:

resource "google_storage_bucket" "image-store" {
  name     = "image-store-bucket"
  location = "EU"
  cors_rule {
        response_headers = ["*"]
        allowed_methods = ["PUT","POST"]
        allower_origins = ["https://gcs-website-test.hashicorp.com"]
        response_headers = ["ETag"]
        max_age_seconds = 3000
  }
}

[AVVS]

It has a tad different params:

    "origin": Array<string>,
    "responseHeader": Array<string>,
    "method": Array<string>,
    "maxAgeSeconds": int64

However, this would be superb to have, too, otherwise its manual labour :(

[kolpav]

Just starting out with terraform and first thing I tried to do is not supported 😄 would be really nice to have it. Please consider adding it.
For anyone searching for temp. solution you can do

// cors-json-file.json
[
    {
      "origin": ["*"],
      "responseHeader": ["Content-Type"],
      "method": ["GET", "HEAD"],
      "maxAgeSeconds": 3600
    }
]

gsutil cors set cors-json-file.json gs://<your-bucket-name>
gsutil cors get gs://<your-bucket-name>

[danawillow]

Fixed in #14695

[ghost]

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