Fix up the workflow to use toolshed

Author: SchoberMJ

.github/workflows/main.yml

@@ -5,6 +5,7 @@ env:
 jobs:
   debug:
     runs-on: ubuntu-latest
+    container: ghcr.io/opencyphal/toolshed:ts20.4.1
     strategy:
       matrix:
         toolchain: ['clang', 'gcc']
@@ -16,24 +17,17 @@ jobs:
             c-compiler: clang
             cxx-compiler: clang++
     steps:
-      - uses: actions/checkout@v2
-      - run: |
-          wget https://apt.llvm.org/llvm.sh
-          chmod +x llvm.sh
-          sudo ./llvm.sh $LLVM_VERSION
-          sudo apt update -y && sudo apt upgrade -y
-          sudo apt-get -y install gcc-multilib g++-multilib clang-tidy-$LLVM_VERSION
-          sudo update-alternatives --install /usr/bin/clang-tidy clang-tidy /usr/bin/clang-tidy-$LLVM_VERSION 50
-          clang-tidy --version
+      - uses: actions/checkout@v3
       - run: >
           cmake
           -B ${{ github.workspace }}/build
           -DCMAKE_BUILD_TYPE=Debug
           -DCMAKE_C_COMPILER=${{ matrix.c-compiler }}
           -DCMAKE_CXX_COMPILER=${{ matrix.cxx-compiler }}
           tests
-      - working-directory: ${{github.workspace}}/build
+      - name: make
         run: |
+          cd ${{ github.workspace }}/build
           make VERBOSE=1
           make test
       - uses: actions/upload-artifact@v2
@@ -45,6 +39,7 @@ jobs:
 
   optimizations:
     runs-on: ubuntu-latest
+    container: ghcr.io/opencyphal/toolshed:ts20.4.1
     strategy:
       matrix:
         toolchain: ['clang', 'gcc']
@@ -57,10 +52,7 @@ jobs:
             c-compiler: clang
             cxx-compiler: clang++
     steps:
-      - uses: actions/checkout@v2
-      - run: |
-          sudo apt update -y && sudo apt upgrade -y
-          sudo apt install gcc-multilib g++-multilib
+      - uses: actions/checkout@v3
       - run: >
           cmake
           -B ${{ github.workspace }}/build
@@ -69,8 +61,9 @@ jobs:
           -DCMAKE_CXX_COMPILER=${{ matrix.cxx-compiler }}
           -DNO_STATIC_ANALYSIS=1
           tests
-      - working-directory: ${{github.workspace}}/build
+      - name: make
         run: |
+          cd ${{ github.workspace }}/build
           make VERBOSE=1
           make test
       - uses: actions/upload-artifact@v2