Easystacks split up into lists

• One list per toolchain version (eg foss-2025 etc)
• "Common" software is installed everywhere
• "Cpu-compute" software is installed where GPU hardware is not available
• "Cuda-compute" and "Rocm-compute" lists will be customised according to the particlar architecture, and include specific software versions for that device.

Less maintenance of lists

• Can deprecate a whole toolchain by removing that list.
• Can add one software module to all nodes by adding it in common
• Can add one software to any one node by adding it to the arch list
• Arch-specific lists are small because most of the software is in the common list