Blender Git Loki

Fix T60585: threadripper CPU only using 16 threads for e.g. sculpting.

This reverts the changes from ce927e1 to put the main and job threads on
node 0. The problem is that all threads created as children from these
threads will inherit the NUMA node and so will end up on the same node.
This can be fixed case-by-case by assigning the NUMA node for every child
thread, however this is difficult for external libraries and OpenMP, and
out of our control for plugins like external renderers.