fix: ensure mutually-exclusive "none" option for Vouchers question

[jaredcwhite]

This PR addresses #751

• Addresses the issue in full
• Addresses only certain aspects of the issue

Description

When you get to the Common App question about Section 8 vouchers, etc., you'll see that if you select None of the above, it deselects the other options—and when you select one of those, None is deselected.

How Can This Be Tested/Reviewed?

Fill out Common App, verify the option selection

Author Checklist:

• Added QA notes to the issue with applicable URLs
• Reviewed in a desktop view
• Reviewed in a mobile view
• Reviewed considering accessibility
• Added tests covering the changes
• Made corresponding changes to the documentation
• Ran yarn generate:client and/or created a migration when required

Review Process:

• Read and understand the issue
• Ensure the author has added QA notes
• Review the code itself from a style point of view
• Pull the changes down locally and test that the acceptance criteria is met
• Either (1) explicitly ask a clarifying question, (2) request changes, or (3) approve the PR, even if there are very small remaining changes, if you don't need to re-review after the updates

[mcgarrye]

LGTM

[mcgarrye]

Actually! Question for @sarahlazarich and @jaredcwhite, should we fix this for the paper application as well in this ticket?

[jaredcwhite]

@mcgarrye @sarahlazarich I think we should!

[sarahlazarich]

@jaredcwhite, let's handle that as a follow up actually!