Add auth spans and remove deduplication code for scopes (#89804)

Adds more spans for timing in accesscontrol and remove permission deduplicating code after benchmarking

---------

Signed-off-by: Dave Henderson <dave.henderson@grafana.com>
Co-authored-by: Dave Henderson <dave.henderson@grafana.com>
Co-authored-by: Ieva <ieva.vasiljeva@grafana.com>

pkg/services/accesscontrol/api/api.go

@@ -62,7 +62,7 @@ func (api *AccessControlAPI) getUserPermissions(c *contextmodel.ReqContext) resp
 		return response.JSON(http.StatusInternalServerError, err)
 	}
 
-	return response.JSON(http.StatusOK, ac.GroupScopesByAction(permissions))
+	return response.JSON(http.StatusOK, ac.GroupScopesByActionContext(c.Req.Context(), permissions))
 }
 
 // GET /api/access-control/users/permissions/search