[CI] Speeding Up Compatibility Builds

The compatibility CI builds are taking longer than expected, especially
for the GCC builds. They appear to be having issues with CCache.

Trying to clean up the tests to speed them up.

Author: AlexandreSinger

.github/workflows/test.yml

@@ -611,19 +611,18 @@ jobs:
       fail-fast: false
       matrix:
         include:
-        - { name: 'GCC 11 (Ubuntu Noble - 24.04)',    eval: 'CC=gcc-11 && CXX=g++-11',       key: 'gcc-11', }
         - { name: 'GCC 12 (Ubuntu Noble - 24.04)',    eval: 'CC=gcc-12 && CXX=g++-12',       key: 'gcc-12', }
         - { name: 'GCC 14 (Ubuntu Noble - 24.04)',    eval: 'CC=gcc-14 && CXX=g++-14',       key: 'gcc-14', }
         - { name: 'Clang 16 (Ubuntu Noble - 24.04)',  eval: 'CC=clang-16 && CXX=clang++-16', key: 'clang-16', }
         - { name: 'Clang 17 (Ubuntu Noble - 24.04)',  eval: 'CC=clang-17 && CXX=clang++-17', key: 'clang-17', }
         - { name: 'Clang 18 (Ubuntu Noble - 24.04)',  eval: 'CC=clang-18 && CXX=clang++-18', key: 'clang-18', }
         # Note: We do not include GCC-13 since it is the default and is already tested.
+        #       We also do not include GCC-11 since it is tested in the JammyCompatibility test.
     name: 'B: ${{ matrix.name }}'
+    env:
+      MATRIX_EVAL: ${{ matrix.eval }}
     steps:
 
-    - uses: actions/setup-python@v5
-      with:
-        python-version: 3.12.3
     - uses: actions/checkout@v4
       with:
         submodules: 'true'
@@ -639,25 +638,21 @@ jobs:
       with:
         key: ${{ github.job }}-${{ matrix.key }}
 
-    - name: Test
+    - name: Build
       env:
-        CMAKE_PARAMS: "-DVTR_ASSERT_LEVEL=3 -DWITH_BLIFEXPLORER=on -DWITH_ODIN=on -DVTR_IPO_BUILD=off"
-        MATRIX_EVAL: ${{ matrix.eval }}
+        CMAKE_PARAMS: "-DVTR_ASSERT_LEVEL=3 -DVTR_IPO_BUILD=off"
         BUILD_TYPE: debug # Note: We use the debug build here to make the build time faster since we do not care about run time.
-        NUM_PROC: ${{ steps.cpu-cores.outputs.count }}
       run: |
         export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
-        ./.github/scripts/build.sh
+        make -j${{ steps.cpu-cores.outputs.count}}
 
   JammyCompatibility:
     name: 'Ubuntu Jammy - 22.04 Compatibility Test'
     runs-on: ubuntu-22.04
     needs: [BuildVTR]
+    env:
+      MATRIX_EVAL: "CC=gcc-11 && CXX=g++-11"
     steps:
-    - uses: actions/setup-python@v5
-      with:
-        python-version: 3.10.10
-
     - uses: actions/checkout@v4
       with:
         submodules: 'true'
@@ -673,13 +668,11 @@ jobs:
       with:
         key: ${{ github.job }}
 
-    - name: Test
+    - name: Build
       env:
         CMAKE_PARAMS: "-DVTR_ASSERT_LEVEL=3 -DCMAKE_COMPILE_WARNING_AS_ERROR=on -DVTR_IPO_BUILD=off"
-        MATRIX_EVAL: 'CC=gcc-11 && CXX=g++-11'
         BUILD_TYPE: debug # Note: We use the debug build here to make the build time faster since we do not care about run time.
-        NUM_PROC: ${{ steps.cpu-cores.outputs.count }}
       run: |
         export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
-        ./.github/scripts/build.sh
+        make -j${{ steps.cpu-cores.outputs.count}}