### Godot version

v4.0.beta16.official [518b9e580]

### System information

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### Issue description

The description of `Control._has_point(position)`-virtual function is outdated likely due to #66688. 

> Note: If you want to check if a point is inside the control, you can use `get_rect().has_point(point)`.

After #66688, get_rect() returns the Controls rect relative to its parent, while the point is relative to the Control.

Also, the note refers to `point` while it likely should refer to the parameter `position`. That said, in this case, I think the incorrect name is better and the parameter of the function should be changed to`point` to avoid shadowing `Control.position`.

Suggested fixes:
1. Change the note to match the new behavior (`Rect2(Vector2.ZERO, size).has_point(point)` should work; verify) OR introduce `get_local_rect()` that matches the old behavior and recommend using it instead.
2. Change the name of the `position` parameter to `point` in `Control._has_point(position)`

### Steps to reproduce

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### Minimal reproduction project

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switch (p_notification) {
		case NOTIFICATION_POSTINITIALIZE: {
			_invalidate_theme_cache();
			_update_theme_item_cache();
		} break;
		case NOTIFICATION_PARENTED: {
			Node *parent_node = get_parent();
			data.parent_control = Object::cast_to<Control>(parent_node);
			data.parent_window = Object::cast_to<Window>(parent_node);
			data.theme_owner->assign_theme_on_parented(this);
			_update_layout_mode();
		} break;
		case NOTIFICATION_UNPARENTED: {
			data.parent_control = nullptr;
			data.parent_window = nullptr;
			data.theme_owner->clear_theme_on_unparented(this);
		} break;
		case NOTIFICATION_ENTER_TREE: {
			notification(NOTIFICATION_THEME_CHANGED);
		} break;
		case NOTIFICATION_POST_ENTER_TREE: {
			data.minimum_size_valid = false;
			data.is_rtl_dirty = true;
			_size_changed();
		} break;
		case NOTIFICATION_EXIT_TREE: {
			release_focus();
			get_viewport()->_gui_remove_control(this);
		} break;