SPI-2698: LCG_106b_ATLAS_1/2
The MR adds new toolchains for 106b_ATLAS_1/2 based on heptools-106a_ATLAS_7/8, no changes in generator content.
The MR adds new toolchains for 106b_ATLAS_1/2 based on heptools-106a_ATLAS_7/8, no changes in generator content.