[terraform] Add Tunnelbroker

Summary:
Terraform configuration from Tunnelbroker.

RabbitMQ docs: terraform resource, AWS docs.

The service is mostly copy-paste from other services

Depends on D9160, D9162

Test Plan: Created a Docker image from the stack and tested deployment on staging.

Reviewers: kamil, michal, varun, jon

Reviewed By: michal

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D9165