Rename manual overrides

[jkirk5]

Desired capability or behavior.

from @Kenneth-T-Moore: manual_overrides is a misnomer. The user specifies an override by providing a value for a normally-computed-output in the .csv or the aviary_values dict. Manual overrides in this sense are the automatic overrides for a couple of geometry outputs that are computed in both FLOPS and GASP using different calculations. We choose which ones to use, and which ones to override based on the gasp/flops prioritization.

Based on the above context, we should rename manual_overrides to something that is more intuitive.

Is your feature request related to a problem? Please describe.

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Associated Bug Report

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