Blender Git Loki

Fix T92423: Blender freeze rendering animation with Mantaflow

Mantaflow could steal tasks from dependency graph, which under
certain conditions causes a recursive lock involving GIL.

Isolate threading done in mantaflow when it is interfaced form
the dependency graph.

Isolation done from the modifier, since the deeper calls are
branching out quite quickly.

Differential Revision: https://developer.blender.org/D13011