Use EvaluateAtPoints as the kernel of all evaluation at positions

src/algebra/IntegrationTools.hpp

src/language/modules/MeshModule.cpp

src/language/utils/EvaluateAtPoints.hpp

src/language/utils/InterpolateItemArray.hpp

src/language/utils/InterpolateItemValue.hpp

src/mesh/MeshTransformer.cpp

tests/test_PugsFunctionAdapter.cpp