Add dataproc component gateway

[c2thorn]

Release Note Template for Downstream PRs (will be copied)

[beta-only]dataproc: added component gateway support to `google_dataproc_cluster`

Fixes hashicorp/terraform-provider-google#4128

Note:
The Component Gateway feature is in alpha, so I reached out to the Dataproc team to see if it would be a good idea to support it now. This PR will be available to anyone who wants it, but it won't be merged until we have a stronger sense of if the API will remain as it is now.

[modular-magician]

Hi! I'm the modular magician, I work on Magic Modules.
I see that this PR has already had some downstream PRs generated. Any open downstreams are already updated to your most recent commit, 4866290.

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#1298
depends: hashicorp/terraform-provider-google#4745

[modular-magician]

Hi! I'm the modular magician, I work on Magic Modules.
I see that this PR has already had some downstream PRs generated. Any open downstreams are already updated to your most recent commit, fe9c23a.

Pull request statuses

terraform-provider-google-beta already has an open PR.
No diff detected in terraform-google-conversion.
terraform-provider-google already has an open PR.
No diff detected in Ansible.
No diff detected in Inspec.

New Pull Requests

I didn't open any new pull requests because of this PR.

[danawillow]

LGTM. I'm going to hold off on approving this until the feature is in beta so we don't accidentally merge this.

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 1 file changed, 21 insertions(+))
Terraform Beta: Diff ( 3 files changed, 143 insertions(+), 37 deletions(-))

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 1 file changed, 21 insertions(+))
Terraform Beta: Diff ( 3 files changed, 107 insertions(+))

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 1 file changed, 21 insertions(+))
Terraform Beta: Diff ( 3 files changed, 105 insertions(+))

[c2thorn]

Updated these changes to fit with the current provider (3.0.0 changes, vcr, etc). Also added a computed only field.

[danawillow]

Can you add a [beta-only] note to the changelog so the release mgr knows not to put it in the one for the GA provider?