[RM-6379] Replace std::exception with GlobalException

Created on 2021-03-17 10:10:16 by Ali Allaoui. % Done: 100

Before a complete review of thrown exceptions, make their types homogeneous to use only AmzExceptions (see RedshiftLibrary/common/exception.h)

Replace @throw std::runtime_error("my error message")@ with @throw GlobalException(UNKNOWN_ERROR,"my error message")@