Clean up Bazel build artifacts after installation

Signed-off-by: Matthieu MOREL <[email protected]>

Author: mmorel-35

bazel/external/Dockerfile.bazel

@@ -78,4 +78,5 @@ RUN curl -LO https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSI
 # If it takes more than 2 hours, restart the Docker build.
 ENV EXTRA_BAZEL_ARGS="--tool_java_runtime_version=local_jdk"
 RUN ./compile.sh && \
-    cp /output/bazel /usr/bin/bazel
+    mv /output/bazel /usr/bin/bazel && \
+    rm -rf /root/bazel /root/bazel-${BAZEL_VERSION}-dist.zip