### Godot version

v4.0.beta11.official [91713ced8]

### System information

MX Linux 21

### Issue description

In Godot 3, TileMap had methods get_used_cells() and get_used_cells_by_id(). Godot 4's TileMap only has get_used_cells() and is missing get_used_cells_by_id().

get_used_cells_by_id() is highly useful in multiple cases, for example when trying to get all cells that are of road type, to randomly spawn a car.

Re-implementing get_used_cells_by_id() should be simple. The method could simply call get_used_cells(), and ignore all cells that are of the wrong ID.

### Steps to reproduce

N/A

### Minimal reproduction project

N/A
} break;
		case NOTIFICATION_DRAW: {
			if (tile_set.is_valid()) {
				RenderingServer::get_singleton()->canvas_item_set_sort_children_by_y(get_canvas_item(), is_y_sort_enabled());
			}
		} break;
		case NOTIFICATION_EXIT_CANVAS: {
			for (int layer = 0; layer < (int)layers.size(); layer++) {
				for (KeyValue<Vector2i, TileMapQuadrant> &E_quadrant : layers[layer].quadrant_map) {
					TileMapQuadrant &q = E_quadrant.value;
					for (const KeyValue<Vector2i, RID> &kv : q.occluders) {
						RS::get_singleton()->canvas_light_occluder_attach_to_canvas(kv.value, RID());
					}
				}
			}
		} break;
	}
}
void TileMap::_rendering_update_layer(int p_layer) {
	ERR_FAIL_INDEX(p_layer, (int)layers.size());
	RenderingServer *rs = RenderingServer::get_singleton();
	if (!layers[p_layer].canvas_item.is_valid()) {
		RID ci = rs->canvas_item_create();
		rs->canvas_item_set_parent(ci, get_canvas_item());
		/*Transform2D xform;
		xform.set_origin(Vector2(0, p_layer));
		rs->canvas_item_set_transform(ci, xform);*/
		rs->canvas_item_set_draw_index(ci, p_layer - (int64_t)0x80000000);
		layers[p_layer].canvas_item = ci;
	}