Switch GEANT4 from ALICE to original

It is desirable to switch source for GEANT4 in the recipe from https://github.com/alisw/geant4 to https://github.com/Geant4/geant4. While we loose patches from ALICE group we will be able to use directly latest versions of GEANT4 without need to wait for ALICE to bump the versions. Also as a part of this effort, bump version of GEANT4 to the latest one (at the time of writing 11.0.2).