Fix Bugs for integration with SISSORegressors/Classifiers

src/classification/LPWrapper.cpp

src/descriptor_identifier/SISSO_DI/SISSOClassifier.cpp

src/descriptor_identifier/SISSO_DI/SISSOClassifier.hpp

src/descriptor_identifier/SISSO_DI/SISSOLogRegressor.cpp

src/descriptor_identifier/SISSO_DI/SISSORegressor.cpp

src/feature_creation/feature_space/FeatureSpace.cpp

src/loss_function/LossFunctionConvexHull.cpp

src/loss_function/LossFunctionConvexHull.hpp

src/loss_function/LossFunctionLogPearsonRMSE.cpp

src/loss_function/LossFunctionLogPearsonRMSE.hpp

src/loss_function/LossFunctionPearsonRMSE.cpp

src/loss_function/LossFunctionPearsonRMSE.hpp

src/python/descriptor_identifier/SISSOClassifier.cpp

src/utils/project.cpp