Add center-of-mass motion remover in OpenMM export

[mattwthompson]

Description

Resolves #1127

Checklist

• Add tests
• Lint
• Update docstrings

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.77%. Comparing base (d283069) to head (557f847).
Report is 140 commits behind head on main.

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[mattwthompson]

Need to provide a backdoor to get the regression tests to pass. I think this would involve including the new "force" as an acceptable difference

Relates to #1101 but is not dependent on it

[mattwthompson]

Pretty sure this is now good to go, will wait for CI to flow overnight

This depends on openforcefield/interchange-regression-testing@83067d7

[Yoshanuikabundi]

Works for me locally via ForceField.create_openmm_system() and Interchange.to_openmm_simulation(). Looks great!

[mattwthompson]

Thanks again @Yoshanuikabundi!