message: Improved generate emtests and generate spectests
diff: # Generate files
  generate-spectests:
  - WASMER_RUNTIME_GENERATE_SPECTESTS=1 cargo build -p wasmer-runtime-core --release
  + WASMER_RUNTIME_GENERATE_SPECTESTS=1 cargo build -p wasmer-runtime-core --release \
  + && echo "formatting" \
  + && cargo fmt
  generate-emtests:
  - WASM_EMSCRIPTEN_GENERATE_EMTESTS=1 cargo build -p wasmer-emscripten-tests --release
  + WASM_EMSCRIPTEN_GENERATE_EMTESTS=1 cargo build -p wasmer-emscripten-tests --release \
  + && echo "formatting" \
  + && cargo fmt
  generate-wasitests: wasitests-setup
  WASM_WASI_GENERATE_WASITESTS=1 cargo build -p wasmer-wasi-tests --release -vv \
  