docs: Add Managed Kafka terraform samples for Clusters and Topics

[jessdejong]

Description

Fixes https://b.corp.google.com/issues/343411931

Checklist

Readiness

• [x] Yes, merge this PR after it is approved
• [ ] No, don't merge this PR after it is approved

Style

• [x] My sample follows the rules described for Terraform in the Effective Samples style guide
• [x] My sample follows the other requirements and best practices in the Contributing guide

Testing

• [x] I have performed tests described in the Contributing guide:

  • [x] Tests pass: terraform apply
  • [x] Lint pass: terraform fmt check

Intended location

• [x] Yes, this sample will be (or already is) included on cloud.google.com Location(s): https://cloud.google.com/managed-kafka/docs

• [ ] No, this sample won't be included on cloud.google.com Reason:

API enablement

• [x] If the sample needs an API enabled to pass testing, I have added the service to the Test setup file

Review

• [x] If this sample adds a new directory, I have added codeowners to the CODEOWNERS file

[snippet-bot[bot]]

Here is the summary of changes.

You are about to add 4 region tags.

- [managedkafka/managedkafka_create_cluster/main.tf:17](https://github.com/jessdejong/terraform-docs-samples/blob/ad53b5111fcac0ed8ac01a4cb1ea7e3441da98c5/managedkafka/managedkafka_create_cluster/main.tf#L17), tag `managedkafka_create_cluster_parent` - [managedkafka/managedkafka_create_cluster/main.tf:18](https://github.com/jessdejong/terraform-docs-samples/blob/ad53b5111fcac0ed8ac01a4cb1ea7e3441da98c5/managedkafka/managedkafka_create_cluster/main.tf#L18), tag `managedkafka_create_cluster` - [managedkafka/managedkafka_create_topic/main.tf:17](https://github.com/jessdejong/terraform-docs-samples/blob/ad53b5111fcac0ed8ac01a4cb1ea7e3441da98c5/managedkafka/managedkafka_create_topic/main.tf#L17), tag `managedkafka_create_topic_parent` - [managedkafka/managedkafka_create_topic/main.tf:35](https://github.com/jessdejong/terraform-docs-samples/blob/ad53b5111fcac0ed8ac01a4cb1ea7e3441da98c5/managedkafka/managedkafka_create_topic/main.tf#L35), tag `managedkafka_create_topic`

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[conventional-commit-lint-gcf[bot]]

🤖 I detect that the PR title and the commit message differ and there's only one commit. To use the PR title for the commit history, you can use Github's automerge feature with squashing, or use automerge label. Good luck human!

-- conventional-commit-lint bot https://conventionalcommits.org/

[jessdejong]

This PR is starting from scratch from https://github.com/terraform-google-modules/terraform-docs-samples/pull/687 because the original PR got too messy.

[jessdejong]

@msampathkumar should be the reviewer (they were reviewing the previous PR)

[glasnt]

Both executions of this PR failed the integration tests with the same error after just shy of 1 hour:

Error waiting for Creating Cluster: Error code 13, message: an internal error has occurred

The latest CI run from the previous PR had a successful creation of the instance in under 30 minutes.

Re-running tests to see if this is a temporary issue.

/gcbrun

[jessdejong]

Yeah, there was a production issue but that should be resolved now. Thanks for re-running.

[msampathkumar]

Hi @jessdejong shared you a PR suggestion.

@glasnt is one of our awesome leads for this repo. Along with @glasnt, we leads share a cross products interest to support PR like this. In this PR, you are adding codeowner - managedkafka-dev-team. So going forward, this managedkafka-dev-team members can be your first reviewers for this product samples.

I see you are doing good work already but let me say it again. Be familiarise yourself with https://googlecloudplatform.github.io/samples-style-guide/ and if you need support, do reach out chat group or to glasnt or myself.

You are doing great! 👍

[msampathkumar]

/gcbrun

[glasnt]

/gcbrun

[glasnt]

Lint diskspace errors reported in https://github.com/GoogleCloudPlatform/cloud-foundation-toolkit/issues/2427

[jessdejong]

Thanks for your help! Please LMK if there is anything else. It looks like the lint errors seem unrelated -- are we able to submit now?

(also pls see my comment about making the subnet "default", unfortunately we are not able to do that)

[glasnt]

/gcbrun