This completes the implementation of arm64 backend for SIMD instructions. Notably, now the arm64 compiler passes 100% of WebAssemby 2.0 draft specification tests. Combined with the completion of the interpreter and amd64 backend (#624), this finally resolves #484. Therefore, this also documents that wazero is 100% compatible with WebAssembly 1.0 and 2.0. Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io>