use pythia8 3.10 for tests in LHCB_8 layer

...ents/packages/LCG_105c_LHCB_8-aarch64-el9-gcc13-dbg.cmake

...ents/packages/LCG_105c_LHCB_8-aarch64-el9-gcc13-opt.cmake

...nts/packages/LCG_105c_LHCB_8-x86_64-el9-clang16-dbg.cmake

...nts/packages/LCG_105c_LHCB_8-x86_64-el9-clang16-opt.cmake

...ments/packages/LCG_105c_LHCB_8-x86_64-el9-gcc12-dbg.cmake

...ments/packages/LCG_105c_LHCB_8-x86_64-el9-gcc12-opt.cmake

...ments/packages/LCG_105c_LHCB_8-x86_64-el9-gcc13-dbg.cmake

...ments/packages/LCG_105c_LHCB_8-x86_64-el9-gcc13-opt.cmake

...ents/packages/LCG_106c_LHCB_8-aarch64-el9-gcc13-dbg.cmake

...ents/packages/LCG_106c_LHCB_8-aarch64-el9-gcc13-opt.cmake

...nts/packages/LCG_106c_LHCB_8-x86_64-el9-clang16-dbg.cmake

...nts/packages/LCG_106c_LHCB_8-x86_64-el9-clang16-opt.cmake

...ments/packages/LCG_106c_LHCB_8-x86_64-el9-gcc13-dbg.cmake

...ments/packages/LCG_106c_LHCB_8-x86_64-el9-gcc13-opt.cmake