backend/gcs: Create the bucket if it does not exists

[kavehmz]

When running terraform init on a new project if bucket does not exists we get error.

* writing "gs://my-new-bucket-name/terraform/state/default.tflock" failed: googleapi: Error 404: Not Found, notFound
* storage: object doesn't exist

As far as I can read the document, if I provide project, init should try to create the bucket if it does not exists.

https://www.terraform.io/docs/backends/types/gcs.html

My guess is that behavior was changed during recent refactoring which added lock to gcs.

This PR will bring back the behaviour.

[jbardin]

Hi @kavehmz,

Thanks for the PR, but that was a misfeature which should not have made it through review. Terraform should never create unmanaged resources, and I had to remove it in #16865.

While there has been discussion about adding some sort of interface to backends to allow them to create resources, the facts that they cannot be properly managed and that there are always other things required for bootstrapping reduced the desire for the added complexity.

[kavehmz]

noted. Makes sense.

[ghost]

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