Migrate overrides.js into code

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... before republishing this sim.

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Baseline deployed before making changes:

• https://phet-dev.colorado.edu/html/graphing-quadratics/1.3.0-dev.3/phet/graphing-quadratics_all_phet.html
• https://phet-dev.colorado.edu/html/graphing-quadratics/1.3.0-dev.3/phet-io/

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In the above commits, I migrated metadata for model elements from overrides.js to code. This went very quickly, ~10 minutes.

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In the above commits, I migrated metadata for view elements from overrides.js to code. This took ~35 minutes.

Migration is complete. Total time was ~45 minutes. There were no API changes, and no bugs encountered in the overrides.js file.

Deployed after migration:

• https://phet-dev.colorado.edu/html/graphing-quadratics/1.3.0-dev.4/phet/graphing-quadratics_all_phet.html
• https://phet-dev.colorado.edu/html/graphing-quadratics/1.3.0-dev.4/phet-io/

Closing.