Projects: Update to LCG_106a_ATLAS_3
This MR updates the Projects to the new layer LCG_106a_ATLAS_3 (SPI-2665).
The detailed updates are listed at https://lcginfo.cern.ch/compare_releases/None/106a_ATLAS_3/106a_ATLAS_1 for contur, cppcheck, ggvvamp, nlox, qqvvamp, chaplin, openloops, rivet, yoda.