pyopenvdb available for import in 4.4

[BradyAJohnston]

Mostly for testing, but also for general scripting with Blender 4.4, internal modules like pyopenvdb which wasn't available from pypi on on platforms, will now be available internally whens scripting with the bpy python package.

Should help fix errors with running tests. Will need to just add bpy.utils.expose_bundled_modules() before importing.

import bpy

# Add Blender bundled VFX libraries to sys.path.
bpy.utils.expose_bundled_modules()

# Import the library you need.
import pxr
import MaterialX
import OpenImageIO
import PyOpenColorIO
import pyopenvdb

https://developer.blender.org/docs/release_notes/4.4/python_api/#blender-as-a-python-module