Add radius to LuaSurface.destroy_decoratives() and LuaSurface.find_decoratives_filtered()

[Muppet9010]

Add an optional radius argument to LuaSurface.destroy_decoratives() and LuaSurface.find_decoratives_filtered() for use with position to get/destroy all decoratives within a radius of a point. Similar to how radius functions in LuaSurface.find_entities_filtered()

Use case is for deleting all decoratives within a radius of a point without the overhead of returning the decoratives to lua. I use an explosion damage effect to do this for the entities.

[Rseding91]

Seems fine. But why not make it yourself?