Blender Git Loki

Fix Cycles HIP Kernels loading on Arch names with extra options

The kernel file names are search for based on the arch name, for example
gfx1010. However HIP's gcnArchName can contain options such as xnack- in
the name. For example gfx1010:sramecc-:xnack-.

This revision tokenizes the info from gcnArchName and just uses the first
token for choosing the Kernel file to use. Kernels are portable across those
features in the arch name.

Also remove the bit for recompiling ptx as clearly that is not relevant.

Differential Revision: https://developer.blender.org/D13117