Implementation of LJGauss and OPP pair potential under hpmc

[shihkual]

Description

See issues

Motivation and context

hpmc module hasn't provided the equivalent pair potential module in md, which are LJGauss and OPP.

How has this been tested?

Change log

1. Add PairPotentialLJGauss.cc, PairPotentialLJGauss.h, PairPotentialOPP.cc and PairPotentialOPP.h under hpmc.
2. Add the cpp scripts to CMakeList.txt and module.cc under hpmc.
3. Add lj_gauss.py and opp.py under hpmc/pair
4. Add the python scripts to __init__.py and CMakeList.txt under hpmc/pair.
5. Add test_pair_lj_gauss.py and test_pair_opp.py under hpmc/pytest for testing the implementation of hoomd.hpmc.pair.LJGauss and hoomd.hpmc.pair.OPP.
6. Add pytest scripts to CMakeList.txt under hpmc/pytest.

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.

[shihkual]

pre-commit.ci autofix

[shihkual]

Hi @joaander @josephburkhart @tcmoore3, the PR is ready for the first-round review. Would you provide some suggestions on the PR and solutions to the failed checks? Thanks!