build(dockerfile-rust): add wasm tools to the rust docker container (#1552)

### Change summary

Addresses #1551 
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Author: anthony-gomez-fastly

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Breaking:
 
 ### Enhancements:
+- build(dockerfile-rust): add wasm tools to the rust docker container ([#1552](https://github.com/fastly/cli/pull/1552))
 
 ### Bug fixes:
 

Dockerfile-rust

@@ -5,6 +5,7 @@ ENV RUST_TOOLCHAIN=stable
 RUN rustup toolchain install ${RUST_TOOLCHAIN} \
   && rustup target add wasm32-wasip1 --toolchain ${RUST_TOOLCHAIN} \
   && apt-get update && apt-get install -y curl jq && apt-get -y clean && rm -rf /var/lib/apt/lists/* \
+  && cargo install wasm-tools --locked \
   && export FASTLY_CLI_VERSION=$(curl -s https://api.github.com/repos/fastly/cli/releases/latest | jq -r .tag_name | cut -d 'v' -f 2) \
             GOARCH=$(dpkg --print-architecture) \
   && curl -sL "https://github.com/fastly/cli/releases/download/v${FASTLY_CLI_VERSION}/fastly_v${FASTLY_CLI_VERSION}_linux-$GOARCH.tar.gz" -o fastly.tar.gz \