LibJS: Add inline caching for adding new own properties to objects

We already had IC support in PutById for the following cases:
- Changing an existing own property
- Calling a setter located in the prototype chain

This was enough to speed up code where structurally identical objects
(same shape) are processed in a loop:
```js
const arr = [{ a: 1 }, { a: 2 }, { a: 3 }];
for (let obj of arr) {
    obj.a += 1;
}
```

However, creating structurally identical objects in a loop was still
slow:
```js
for (let i = 0; i < 10_000_000; i++) {
    const o = {};
    o.a = 1;
    o.b = 2;
    o.c = 3;
}
```

This change addresses that by adding a new IC type that caches both the
source and target shapes, allowing property additions to be fast-pathed
by directly jumping to the shape that already includes the new property.

Libraries/LibWeb/HTML/Location.cpp

@@ -659,7 +659,7 @@ JS::ThrowCompletionOr<bool> Location::internal_define_own_property(JS::PropertyK
 }
 
 // 7.10.5.7 [[Get]] ( P, Receiver ), https://html.spec.whatwg.org/multipage/history.html#location-get
-JS::ThrowCompletionOr<JS::Value> Location::internal_get(JS::PropertyKey const& property_key, JS::Value receiver, JS::CacheablePropertyMetadata* cacheable_metadata, PropertyLookupPhase phase) const
+JS::ThrowCompletionOr<JS::Value> Location::internal_get(JS::PropertyKey const& property_key, JS::Value receiver, JS::CacheableGetPropertyMetadata* cacheable_metadata, PropertyLookupPhase phase) const
 {
     auto& vm = this->vm();
 
@@ -672,7 +672,7 @@ JS::ThrowCompletionOr<JS::Value> Location::internal_get(JS::PropertyKey const& p
 }
 
 // 7.10.5.8 [[Set]] ( P, V, Receiver ), https://html.spec.whatwg.org/multipage/history.html#location-set
-JS::ThrowCompletionOr<bool> Location::internal_set(JS::PropertyKey const& property_key, JS::Value value, JS::Value receiver, JS::CacheablePropertyMetadata* cacheable_metadata, PropertyLookupPhase phase)
+JS::ThrowCompletionOr<bool> Location::internal_set(JS::PropertyKey const& property_key, JS::Value value, JS::Value receiver, JS::CacheableSetPropertyMetadata* cacheable_metadata, PropertyLookupPhase phase)
 {
     auto& vm = this->vm();