Add tests for remaining wasm simd intrinsics

Wasmtime now supports all of the simd proposal, so this commit
uncomments instruction assertions and tests, while also adding more
tests, for all wasm simd instructions. This means that all wasm simd
instructions should be tested and have running instruction assertions,
except for `i64x2.abs`, which will require an LLVM upgrade to LLVM 13.

Author: alexcrichton

ci/docker/wasm32-wasi/Dockerfile

@@ -7,12 +7,11 @@ RUN apt-get update -y && apt-get install -y --no-install-recommends \
   xz-utils \
   clang
 
-RUN curl -L https://github.com/bytecodealliance/wasmtime/releases/download/v0.26.0/wasmtime-v0.26.0-x86_64-linux.tar.xz | tar xJf -
-ENV PATH=$PATH:/wasmtime-v0.26.0-x86_64-linux
+RUN curl -L https://github.com/bytecodealliance/wasmtime/releases/download/v0.29.0/wasmtime-v0.29.0-x86_64-linux.tar.xz | tar xJf -
+ENV PATH=$PATH:/wasmtime-v0.29.0-x86_64-linux
 
 ENV CARGO_TARGET_WASM32_WASI_RUNNER="wasmtime \
   --enable-simd \
   --enable-threads \
-  --opt-level 0 \
   --mapdir .::/checkout/target/wasm32-wasi/release/deps \
   --"