replace hardcoded paths by variable ones in upload-artifact steps

Author: siggmo

.github/workflows/build_and_test.yaml

@@ -68,17 +68,17 @@ jobs:
         if: failure()
         with:
           name: ${{ format('Ubuntu {0}, {1}', matrix.UBUNTU_VERSION, matrix.ARCH) }} CMakeCache
-          path: build/CMakeCache.txt
+          path: ${{ env.FANS_BUILD_DIR }}/CMakeCache.txt
       - uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: ${{ format('Ubuntu {0}, {1}', matrix.UBUNTU_VERSION, matrix.ARCH) }} CMakeLogs
-          path: 'build/CMakeFiles/*.log'
+          path: '${{ env.FANS_BUILD_DIR }}/CMakeFiles/*.log'
       - uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: ${{ format('Ubuntu {0}, {1}', matrix.UBUNTU_VERSION, matrix.ARCH) }} CompileCommands
-          path: build/compile_commands.json
+          path: ${{ env.FANS_BUILD_DIR }}/compile_commands.json
 
       - name: Compile
         run: |
@@ -99,4 +99,4 @@ jobs:
         if: failure()
         with:
           name: ${{ format('Ubuntu {0}, {1}', matrix.UBUNTU_VERSION, matrix.ARCH) }} CTest logs
-          path: build/Testing/Temporary/LastTest.log
+          path: ${{ env.FANS_BUILD_DIR }}/Testing/Temporary/LastTest.log