Related to coder/coder#14586

If a cache layer is introduced, then dbauthz would be skipped for cache hits. Since the dbauthz is a general settings update, the dbauthz layer cannot sufficiently distinguish the rbac properties of a setting by it's key string alone.

RBAC needs to be woven into runtimeconfig.

One idea is to add some rbac element to Initialize and New so that each field knows it's own RBAC properties.