fix(ops/keycloak): fix assigning grafana_roles

keycloak_openid_user_client_role_protocol_mapper.grafana_role_mapper was
missing. It is configured to make the client roles for this Application
(and only those for this application) available in the grafana_roles
claim.

We can also disable full scope, as we're not interested in other role
mappings.

The Terraform files are a bit reorganized, everything configuring the
Grafana client lives in grafana.tf (and vice-versa for Forgejo,
Buildkite and Gerrit). The only thing left in permissions.tf is global
groups, their memberships and mappings.

Change-Id: I37b0755f4f8658518083353ec6cc0193e805d5c2
Reviewed-on: https://cl.snix.dev/c/snix/+/30476
Tested-by: besadii
Autosubmit: Florian Klink <flokli@flokli.de>
Reviewed-by: Jonas Chevalier <zimbatm@zimbatm.com>

ops/keycloak/permissions.tf

@@ -58,38 +58,3 @@ resource "keycloak_group_roles" "trusted_contributors_roles" {
     keycloak_role.grafana_editor.id
   ]
 }
-
-# Application-level roles.
-
-# Grafana
-
-resource "keycloak_role" "grafana_editor" {
-  realm_id    = keycloak_realm.snix.id
-  client_id   = keycloak_openid_client.grafana.id
-  name        = "Editor"
-  description = "Can edit things in Grafana"
-}
-
-resource "keycloak_role" "grafana_admin" {
-  realm_id    = keycloak_realm.snix.id
-  client_id   = keycloak_openid_client.grafana.id
-  name        = "Admin"
-  description = "Can admin things in Grafana"
-}
-
-# TODO:
-# Forgejo
-
-# resource "keycloak_role" "forgejo_admin" {
-# }
-#
-# resource "keycloak_role" "forgejo_trusted_contributor" {
-# }
-#
-# # Gerrit
-#
-# resource "keycloak_role" "gerrit_admin" {
-# }
-#
-# resource "keycloak_role" "gerrit_trusted_contributor" {
-# }