Update CI to new build system

.github/workflows/ci.yml

@@ -1,5 +1,8 @@
 name: Continuous Integration
 on: [push, pull_request]
+env:
+  CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+  CTEST_OUTPUT_ON_FAILURE: 1
 jobs:
   pre-commit:
     runs-on: ubuntu-latest
@@ -18,26 +21,25 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - uses: actions/cache@v3
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
       - run: sudo apt update && sudo apt install libboost-all-dev
-      - run: mkdir build_dir
-      - working-directory: build_dir
-        run: |
-          git submodule init && git submodule update
-      - working-directory: build_dir
-        run: |
-          cmake .. \
-          -DCMAKE_CXX_FLAGS="-std=c++20 -g" \
-          -Dalpaka_CXX_STANDARD=20 \
-          -DmallocMC_CATCH2_PROVIDER=intern \
+      - run: |
+          cmake -S. -Bbuild \
           -Dalpaka_ACC_CPU_B_OMP2_T_SEQ_ENABLE:BOOL=ON \
           -Dalpaka_ACC_CPU_B_SEQ_T_OMP2_ENABLE:BOOL=ON \
           -Dalpaka_ACC_CPU_B_SEQ_T_SEQ_ENABLE:BOOL=ON \
-          -Dalpaka_ACC_CPU_B_SEQ_T_THREADS_ENABLE:BOOL=ON
-      - working-directory: build_dir
-        run: make -j tests examples
-      - working-directory: build_dir
-        run: ./tests
-      - working-directory: build_dir
-        run: ./mallocMC_Example01
-      - working-directory: build_dir
-        run: ./mallocMC_Example03
+          -Dalpaka_ACC_CPU_B_SEQ_T_THREADS_ENABLE:BOOL=ON \
+          -DmallocMC_BUILD_TESTING:BOOL=ON \
+          -DmallocMC_BUILD_EXAMPLES:BOOL=ON
+      - working-directory: build
+        run: cmake --build . -j
+      - working-directory: build
+        run: ctest
+      - working-directory: build
+        run: |
+          for example in examples/[^C]*/mallocMCExample*; do
+            ./${example}
+          done