LibWeb: Convert the Location object to IDL

This includes:

- Moving it from Bindings/ to HTML/
- Renaming it from LocationObject to Location
- Removing the manual definitions of the constructor and prototype
- Removing special handling of the Location interface from the bindings
  generator
- Converting the JS_DEFINE_NATIVE_FUNCTIONs to regular functions
  returning DeprecatedString instead of PrimitiveString
- Adding missing (no-op) setters for the various attributes, which are
  expected to exist by the bindings generator

Userland/Libraries/LibWeb/Forward.h

@@ -319,6 +319,7 @@ class HTMLUListElement;
 class HTMLUnknownElement;
 class HTMLVideoElement;
 class ImageData;
+class Location;
 class MessageChannel;
 class MessageEvent;
 class MessagePort;
@@ -496,7 +497,6 @@ class URLSearchParamsIterator;
 
 namespace Web::Bindings {
 class Intrinsics;
-class LocationObject;
 class OptionConstructor;
 enum class CanPlayTypeResult;
 enum class CanvasFillRule;