Account for [AllowShared] and improve interface attribute generated setters

[daxpedda]

• Any function that takes a buffer view type and is not marked with [AllowShared] now returns a Result. Only applies to new APIs to avoid breaking changes.
• Buffer view types aren't only translated into Rust slices (e.g. &[u8]), but now additional bindings are generated for JS types (e.g. Uint8Array).
• Setters generated from interface attributes with multiple possible types now properly generate bindings for each type instead of just JsValue. This applies to buffer view types as well. Old setters are deprecated.

Fixes #3772.