[NominalFuzzing] Add typesystem flag to wasm-dis (#4645)
[NominalFuzzing] Add typesystem flag to wasm-dis (#4645)

wasm-dis does enable all features by default, so we don't need the
feature flags, but we do need --nominal etc. since we emit such
modules now.
WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen