[wasm] Redesign of managed objects marshaling and lifecycle (#56538)

[wasm] Redesign of managed objects marshaling and lifecycle (#56538)

file cycle of JS owned C# instances is driven by FinalizationRegistry

- got rid of Runtime._weakDelegateTable and Runtime._rawToJS
- got rid of JSObject.WeakRawObject and JSObject.RawObject
- GCHandle instead of JSObject double proxy for plain managed ref types
- GCHandle instead of int sequence for delegates + redesign of invocation
- GCHandle for task + redesign of invocation
- improved in-flight retention of thenable/promise and Task
- explicitly delegate type of parameter for EventListener
- moved and renamed some binding functions
- renamed all handles to jsHandle or gcHandle as appropriate
- removed jsHandle math
- cleanup of unused functions
- improved error messages for invalid handles
- more unit tests