384 move aromatic sampling from sidechain to angle

[jessicaflowers]

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Description of the Change

Both sidechain and angle perform a similar type of sampling on aromatic residues. This contributes to an oversampling of the aromatics where too many conformers go into QP/MIQP. Here I move all sampling for aromatic residues into angle.

Release Notes

Move aromatic residue sampling from sidechain() into sample_angle()

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[stephaniewankowicz]

Closing this as it produced a worse qFit and we created a new solution.