feat: Emit WebAssembly types separately from DOM types

[ExE-Boss]

Fixes #826

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Note that I’d prefer if there was a way to filter based on the source WebIDL file, rather than the current Flavor const enum approach. This now uses a custom Exposed value of WebAssembly, which is less hackish.

Also, namespace WebAssembly should be omitted from dom and webworker apart from compileStreaming and instantiateStreaming, which is why this leaves #826 open.

Depends on:

• fix(WebAssembly): Correct NativeError subclass types #962 (merged)

See also:

• feat: Use declare class for namespaced types #961
• feat(WebAssembly): Make WebAssembly.Global generic #963
• Consider splitting dom lib events out into separate lib for nodejs use TypeScript#43972

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review?(@saschanaz)

[ExE-Boss]

I’ve marked this as a draft, because this depends on #962 and #963.

[saltman424]

@sandersn Any chance this can get reviewed?

[ExE-Boss]

@saltman424
This PR needs to be redone, as there were many changes to this since I last touched this.