Adapt the `ACTION_OT_select_circle` and `ACTION_OT_select_lasso` operators to take into account grease pencil layer channels. These operators both call `region_select_action_keys` which subsequently calls `region_select_elem` function. In the last function, grease pencil layer needs to be taken into consideration. This resolves #110521 Pull Request: https://projects.blender.org/blender/blender/pulls/110558