Update resource_dataproc_cluster.go.erb

[jaketf]

This PR is to address Issue #3999 for terraform-google-provider.

This is my first PR and I don't really write golang regularly and am confused how to test this go code or if that is something MM will take care of for me.
I'm trying to get some traction on #3999
Please advise on how to make this a more complete PR.

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[slevenick]

Hey @jaketf, thanks for the contribution!

Unfortunately it looks like this change will be a bit complicated. It looks like the gracefulDecommissionTimeout field is set using a query parameter on the PATCH request: https://cloud.google.com/dataproc/docs/reference/rest/v1/projects.regions.clusters/patch

To get this to work from terraform would require adding an optional field for gracefulDecommissionTimeout in the resource's schema (to allow a user to specify it via terraform config) and then adding some custom code that adds this parameter (if it exists) to the URL used by the patch request.

[modular-magician]

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This PR seems not to have generated downstream PRs before, as of f545b5c.

Pull request statuses

No diff detected in terraform-google-conversion.
No diff detected in Ansible.
No diff detected in Inspec.

New Pull Requests

I built this PR into one or more new PRs on other repositories, and when those are closed, this PR will also be merged and closed.
depends: hashicorp/terraform-provider-google-beta#1001
depends: hashicorp/terraform-provider-google#4177