Add pythia8.306-1.0 lambda dataset

Add pythia8.306-1.0 lambda dataset https://github.com/eic/LambdaGen/releases/tag/pythia8.306-1.0. These files already existed as unversioned before and were copied to comply with new nomenclature. Checked by running the generator for reproducibility of first few events. Older files have been left in their original location.