feat(ci): remove protoc installation where possible

We only retain it for the test job which runs `cargo semver-checks` which may need to build the rustdoc for the baseline version which still requires `protoc` to be installed until we make the next round of releases.

Pull-Request: #3592.

.github/workflows/cache-factory.yml

@@ -33,9 +33,6 @@ jobs:
       matrix:
         rust: ${{ fromJSON(needs.gather_msrv_versions.outputs.versions) }}
     steps:
-      - name: Install Protoc
-        run: sudo apt-get install protobuf-compiler
-
       - uses: actions/checkout@v3
 
       - uses: dtolnay/rust-toolchain@master
@@ -55,9 +52,6 @@ jobs:
   make_stable_rust_cache:
     runs-on: ubuntu-latest
     steps:
-      - name: Install Protoc
-        run: sudo apt-get install protobuf-compiler
-
       - uses: actions/checkout@v3
 
       - uses: dtolnay/rust-toolchain@stable

.github/workflows/ci.yml

@@ -96,16 +96,6 @@ jobs:
             os: windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - name: Install Protoc
-        if: ${{ matrix.os != 'ubuntu-latest' }}
-        uses: arduino/setup-protoc@64c0c85d18e984422218383b81c52f8b077404d3 # v1.1.2
-        with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Install Protoc
-        if: ${{ matrix.os == 'ubuntu-latest' }}
-        run: sudo apt-get install protobuf-compiler
-
       - uses: actions/checkout@v3
 
       - uses: dtolnay/rust-toolchain@stable
@@ -130,9 +120,6 @@ jobs:
           - features: "mdns tcp dns tokio"
           - features: "mdns tcp dns async-std"
     steps:
-      - name: Install Protoc
-        run: sudo apt-get install protobuf-compiler
-
       - uses: actions/checkout@v3
 
       - uses: dtolnay/rust-toolchain@stable
@@ -150,9 +137,6 @@ jobs:
     name: Check rustdoc intra-doc links
     runs-on: ubuntu-latest
     steps:
-      - name: Install Protoc
-        run: sudo apt-get install protobuf-compiler
-
       - uses: actions/checkout@v3
 
       - uses: dtolnay/rust-toolchain@stable
@@ -176,9 +160,6 @@ jobs:
           beta
         ]
     steps:
-      - name: Install Protoc
-        run: sudo apt-get install protobuf-compiler
-
       - uses: actions/checkout@v3
 
       - uses: dtolnay/rust-toolchain@master
@@ -199,9 +180,6 @@ jobs:
     name: IPFS Integration tests
     runs-on: ubuntu-latest
     steps:
-      - name: Install Protoc
-        run: sudo apt-get install protobuf-compiler
-
       - uses: actions/checkout@v3
 
       - uses: dtolnay/rust-toolchain@stable

.github/workflows/docs.yml

@@ -9,10 +9,6 @@ jobs:
     name: Build documentation
     runs-on: ubuntu-latest
     steps:
-    - name: Install Protoc
-      uses: arduino/setup-protoc@64c0c85d18e984422218383b81c52f8b077404d3 # v1.1.2
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
     - name: Checkout 
       uses: actions/checkout@v3
     - name: Install nightly toolchain

interop-tests/Dockerfile

@@ -1,11 +1,6 @@
 # syntax=docker/dockerfile:1.5-labs
 FROM rust:1.67.0
 
-# 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
-WORKDIR /protoc-setup
-RUN apt-get update && apt-get install -y cmake
-
 # Run with access to the target cache to speed up builds
 WORKDIR /workspace
 ADD . .