Blender Git Loki

Cycles: Scrambling distance for the PMJ sampler

Adds scrambling distance to the PMJ sampler. This is based
on the work by Mathieu Menuet in D12318 who created the original
implementation for the Sobol sampler.

Reviewed By: brecht

Maniphest Tasks: T92181

Differential Revision: https://developer.blender.org/D12854