Fix build issues with GCC and Clang

This MR fixes two minor issues if compilitation is done with GCC and/or Clang:

1. GCC and Clang complain about std::unique_ptr being undeclared because of a missing include in CsvImportTable.h

error: no template named 'unique_ptr' in namespace 'std'
    std::unique_ptr<const csv::DataArray> m_data;

2. GCC issues a warning about the constructor of the base class not being explicitly called in CloneableVector.h:

base class ‘class std::vector<std::unique_ptr<IAxis>, std::allocator<std::unique_ptr<IAxis> > >’ should be explicitly initialized in the copy constructor [-Werror=extra]
   40 |     CloneableVector(const CloneableVector& other) { copyOther(other); }
      |     ^~~~~~~~~~~~~~~