ci: reduce size of Rust interop-test image (backport #3926)

This is an automatic backport of pull request #3926 done by [Mergify](https://mergify.com).

Pull-Request: #3944.

.github/workflows/interop-test.yml

@@ -12,13 +12,13 @@ concurrency:
 jobs:
   run-multidim-interop:
     name: Run multidimensional interoperability tests
-    runs-on: ubuntu-22.04
+    runs-on: ${{ fromJSON(github.repository == 'libp2p/rust-libp2p' && '["self-hosted", "linux", "x64", "xlarge"]' || '"ubuntu-latest"') }}
     steps:
       - uses: actions/checkout@v3
       - uses: docker/setup-buildx-action@v2
       - name: Build image
         run: docker buildx build --load -t rust-libp2p-head . -f interop-tests/Dockerfile
-      - uses: libp2p/test-plans/.github/actions/run-interop-ping-test@482e8ac2e5d91c69d7f432d325337e2ddca39cf9
+      - uses: libp2p/test-plans/.github/actions/run-interop-ping-test@master
         with:
           test-filter: rust-libp2p-head
           extra-versions: ${{ github.workspace }}/interop-tests/ping-version.json

interop-tests/Dockerfile

@@ -1,5 +1,11 @@
 # syntax=docker/dockerfile:1.5-labs
-FROM rust:1.67.0
+FROM rust:1.67.0 as builder
+
+# Install zlib as long as libp2p-websocket requires it: https://github.com/paritytech/soketto/issues/72
+RUN apt-get update && \
+    apt-get download zlib1g && \
+    mkdir /dpkg && \
+    for deb in *.deb; do dpkg --extract $deb /dpkg || exit 10; done
 
 # Setup protoc. TODO this breaks reproducibility and uses an old version of protoc.
 # In the future protobuf generated files will be checked in, so we can remove this
@@ -11,10 +17,13 @@ WORKDIR /workspace
 ADD . .
 RUN --mount=type=cache,target=./target \
     --mount=type=cache,target=/usr/local/cargo/registry \
-    cargo build --package interop-tests
+    cargo build --release --package interop-tests
 
 RUN --mount=type=cache,target=./target \
-    mv ./target/debug/ping /usr/local/bin/testplan
+    mv ./target/release/ping /usr/local/bin/testplan
 
+FROM gcr.io/distroless/cc
+COPY --from=builder /usr/local/bin/testplan /usr/local/bin/testplan
+COPY --from=builder /dpkg /
 ENV RUST_BACKTRACE=1
 ENTRYPOINT ["testplan"]