Clean up after debug build

Author: graemenail

.github/workflows/windows.yml

@@ -68,6 +68,7 @@ jobs:
 
     # Windows CUDA builds use USE_NCCL=off due to compilation errors.
     - name: Build Debug
+      id: build-debug
       uses: lukka/run-cmake@v3
       with:
         buildDirectory: ${{ github.workspace }}/build/Debug
@@ -93,6 +94,11 @@ jobs:
       # able to find sometimes.
       if: matrix.gpu == true
 
+    - name: Cleanup Debug
+      if: steps.build-debug.conclusion == 'success'
+      working-directory: ${{ github.workspace }}/build/Debug
+      run: cmake --build . --target clean
+
     # Windows CUDA builds use USE_NCCL=off due to compilation errors
     - name: Build Release
       uses: lukka/run-cmake@v3