fix: partial date formatting on paper app

[emilyjablonski]

Description

Will allow partial date formatting on the two paper application date fields.

How Can This Be Tested/Reviewed?

Try to update a paper application with a partially formatted date (i.e. with single integers in month and day, like 1/5/2024 vs 01/05/2024 and ensure the data is saved

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

[YazeedLoonat]

LGTM just a small suggestion