### 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
}
	}
	
	double overlapping_ratio = 1.0;
	if (tile_offset_axis == TileSet::TILE_OFFSET_AXIS_HORIZONTAL) {
		if (tile_shape == TileSet::TILE_SHAPE_ISOMETRIC) {
			overlapping_ratio = 0.5;
		} else if (tile_shape == TileSet::TILE_SHAPE_HEXAGON) {
			overlapping_ratio = 0.75;
		}
		ret.y *= overlapping_ratio;
	} else { 
		if (tile_shape == TileSet::TILE_SHAPE_ISOMETRIC) {
			overlapping_ratio = 0.5;
		} else if (tile_shape == TileSet::TILE_SHAPE_HEXAGON) {
			overlapping_ratio = 0.75;
		}
		ret.x *= overlapping_ratio;
	}
	return (ret + Vector2(0.5, 0.5)) * tile_set->get_tile_size();
}
Vector2i TileMap::local_to_map(const Vector2 &p_local_position) const {
	ERR_FAIL_COND_V(!tile_set.is_valid(), Vector2i());
	Vector2 ret = p_local_position;
	ret /= tile_set->get_tile_size();
	TileSet::TileShape tile_shape = tile_set->get_tile_shape();
	TileSet::TileOffsetAxis tile_offset_axis = tile_set->get_tile_offset_axis();
	TileSet::TileLayout tile_layout = tile_set->get_tile_layout();
	
	double overlapping_ratio = 1.0;