[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.

Removed the GCC-11 compatibility test since it was already being tested
in the Jammy compatibility test.

Removed Odin from the compatibility test since it is not the default
flow.

Cleaned up some enviornment variables.

Author: AlexandreSinger

.github/workflows/test.yml

@@ -611,19 +611,19 @@ 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', }
+        - { name: 'GCC 12 (Ubuntu Noble - 24.04)',    CC: 'gcc-12',   CXX: 'g++-12',     }
+        - { name: 'GCC 14 (Ubuntu Noble - 24.04)',    CC: 'gcc-14',   CXX: 'g++-14',     }
+        - { name: 'Clang 16 (Ubuntu Noble - 24.04)',  CC: 'clang-16', CXX: 'clang++-16', }
+        - { name: 'Clang 17 (Ubuntu Noble - 24.04)',  CC: 'clang-17', CXX: 'clang++-17', }
+        - { name: 'Clang 18 (Ubuntu Noble - 24.04)',  CC: 'clang-18', CXX: '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:
+      CC: ${{ matrix.CC }}
+      CXX: ${{ matrix.CXX }}
     steps:
 
-    - uses: actions/setup-python@v5
-      with:
-        python-version: 3.12.3
     - uses: actions/checkout@v4
       with:
         submodules: 'true'
@@ -637,27 +637,24 @@ jobs:
 
     - uses: hendrikmuhs/[email protected]
       with:
-        key: ${{ github.job }}-${{ matrix.key }}
+        key: ${{ github.job }}-${{ matrix.CC }}
 
-    - 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:
+      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'
@@ -671,15 +668,13 @@ jobs:
 
     - uses: hendrikmuhs/[email protected]
       with:
-        key: ${{ github.job }}
+        key: ${{ github.job }}-gcc-11
 
-    - 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}}