Automatically create roles and groups based most common personas

[micahlmartin]

We should have modules that give us a good starting point with RBAC for the most common personas. Here's just a few ideas:

Harness Admin: Full access to all of Harness features.
Pipeline Engineer: Ability to create and edit pipelines and templates.
Product Owner: Ability to created and edit dashboards, access deployment details.
Application Developer: Can execute non-prod deployments. Optionally scoped to a specific project.
Release Manager: Can execute or approve production deployments. Optionally scoped to a specific project.

Not sure if this should live in this repo as a module or if we should move to one of the other existing terraform module repos.