Fix spice tests performance
Due to the large header files, compiling is slow with clang 11 and msvc. Do not include the data as variable, but load them during run, so compiling of the build is faster
Edited by Martin Marmsoler
Due to the large header files, compiling is slow with clang 11 and msvc. Do not include the data as variable, but load them during run, so compiling of the build is faster