Add reporting UI to terraform

[bdomen-ggl]

Add Reporting UI and associated services to Terraform. Also added a reporting_ui file to cmms so the Reporting UI resources are created during the GitHub action.

What is created:

• 3 IAM service accounts (UI, GRPC, Gateway)
• S3 bucket

[wfa-reviewable]

This change is 

[bdomen-ggl]

I wasn't able to get Terraform working. So I may need to make some changes.

Reviewable status: 0 of 5 files reviewed, all discussions resolved (waiting on @SanjayVas)

[SanjayVas]

Reviewed 3 of 5 files at r1, all commit messages.
Reviewable status: 3 of 5 files reviewed, 2 unresolved discussions (waiting on @bdomen-ggl)

---

src/main/terraform/gcloud/cmms/reporting_ui.tf line 15 at r1 (raw file):

# limitations under the License.

module "reporting_v2_cluster" {

This name is quite inaccurate, as it's definitely not a module which creates a cluster.

Code quote:

reporting_v2_cluster

---

src/main/terraform/gcloud/modules/reporting-ui/main.tf line 21 at r1 (raw file):

}

module "reporting_ui_user" {

This looks like the only IAM service account granted any permissions. Not every pod needs a service account; just those that need extra permissions to access things outside of the cluster.