[BB-843] - Grafana OIDC template and documentation

Adding support for mapping the below settings to the native settings in the grafana helm chart:

monitoring:
 sso:
    enabled: true
    grafana:
      client_id: grafana
      client_secret: "change_me"
      scopes: ""
      allow_sign_up: "true"
      role_attribute_path: "Viewer"