fix Brownian integrators when using anisotropic interactions and zeroing out elements of the moment of inertia tensor

[SchoeniPhlippsn]

Description

The Brownian integrators did not zero out the torques of an anisotropic pair potential when the moment of inertia has a 0 element. This PR fixes that bug in both the regular and rattle Brownian integrator.

Motivation and context

Important for simulations of particles with fixed orientations

How has this been tested?

I tested it on some of my simulations.

Change log

Fix Brownian integrators when using anisotropic interactions and zeroing out elements of the moment of inertia tensor

Checklist:

• [x] I have reviewed the Contributor Guidelines.
• [x] I agree with the terms of the HOOMD-blue Contributor Agreement.
• [x] My name is on the list of contributors (sphinx-doc/credits.rst) in the pull request source branch.

[joaander]

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