add variables, update DaVinci version, update platform
- update to DaVinci/v64r8
- revert to v64r8@x86_64_v2-el9-clang16-opt as advised
- add few missing variables
- should replace https://lhcb-analysis-productions.web.cern.ch/productions/?wg=b2oc&analysis=bd2dpi_run3&ver=v1r1466&dset=bd2dpi_2024data_down