rust: add a check-msrv job

.github/workflows/test-rust-project.yml

@@ -6,6 +6,10 @@ on:
       apt_packages:
         required: false
         type: string
+      msrv:
+        required: false
+        type: string
+        default: "1.57.0"
     secrets:
       github-token:
         required: false
@@ -44,6 +48,46 @@ jobs:
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
 
+  check-msrv:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: true
+      matrix:
+        os:
+          - macos-11
+          - ubuntu-20.04
+          - windows-2022
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
+
+    - name: Install Rust toolchain (Unix)
+      if: runner.os != 'Windows'
+      shell: bash
+      run:
+        curl https://sh.rustup.rs -sSf | sh -s -- --profile default --default-toolchain ${{ inputs.msrv }} -y
+
+    - name: Install rust toolchain (Windows)
+      if: runner.os == 'Windows'
+      shell: bash
+      run: |
+        curl https://static.rust-lang.org/rustup/dist/x86_64-pc-windows-msvc/rustup-init.exe -o rustup-init.exe
+        ./rustup-init --profile default --default-toolchain ${{ inputs.msrv }} -y
+
+    - name: Cache cargo registry and build outputs
+      uses: actions/cache@26968a09c0ea4f3e233fdddbafd1166051a095f6
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/bin
+          target
+        key: ${{ runner.os }}-cargo-${{ matrix.rust }}-${{ hashFiles('Cargo.lock') }}
+
+    - name: Test compilation
+      uses: actions-rs/cargo@844f36862e911db73fe0815f00a4a2602c279505
+      with:
+        command: check
+
   test:
     runs-on: ${{ matrix.os }}
     strategy: