Fix #131299: Grease Pencil: Moving keyframes doesn't update viewport

Grease Pencil animation data is stored in the object-data, not the
`AnimData` of the Grease Pencil ID. This meant that the object was
not properly tagged for an update, because the code assumed that
the object had an `adt`.

The fix calls `ANIM_id_update` to directly tag the Grease Pencil
ID for an update (which will also update the Grease Pencil frames
animation data).

source/blender/editors/transform/transform_convert_action.cc

@@ -1077,6 +1077,7 @@ static void recalcData_actedit(TransInfo *t)
         }
         grease_pencil_layer_reset_trans_data(
             *static_cast<blender::bke::greasepencil::Layer *>(ale->data));
+        ANIM_id_update(ale->bmain, ale->id);
       }
       ANIM_animdata_freelist(&anim_data);
     }