Static Security & Compliance page for core users
This epic represents the first stage of https://gitlab.com/groups/gitlab-org/-/epics/4787, which is to implement a static version of the page based on discussions in https://gitlab.com/gitlab-org/gitlab/-/issues/283978#note_467266410.
## Approximate goal

## Implementation plan
* ~backend:
1. Make `Mutation.configureSast` mutation
* ~frontend
1. Define Core controller, route + HAML template - put behind feature flag
1. Define JS entry point + skeleton Vue app
1. Implement table + datastructures in Vue app
1. Provide *some* data, like docs links, from controller to Vue app + consume in Vue app
1. (Needs ~backend help) Correctly wire up CE/EE controllers, such that if Ultimate, EE version is shown, otherwise, CE version.
epic