change implementation of Get_Pressure_From_DE from hydro/hydro_cuda to utils/hydro_utils
change implementation of Get_Pressure_From_DE from hydro/hydro_cuda to utils/hydro_utils

cholla-hydro/cholla,evaneschneider/cholla,cholla-hydro/cholla,evaneschneider/cholla,cholla-hydro/cholla,evaneschneider/cholla,cholla-hydro/cholla,evaneschneider/cholla