Add new tab for archived vouchers within a program's vouchers/units

[dtgreiner]

Please squash merge this PR

Description

Add a new tab in the Program's Vouchers/Units section to show the archived vouchers. These vouchers can now be restored.

Type of change

• New feature (adds functionality)

Checklist before requesting review

• I have performed a self-review of my code
• I have run the code that is being changed under ideal conditions, and it doesn't fail
• My code includes comments and/or descriptive variable names to help other engineers understand the intent (or not applicable)
• My code follows the style guidelines of this project (rubocop)
• I have updated the documentation (or not applicable)
• If it's not obvious how to test this change, I have provided testing instructions in this PR or the related issue

[eanders]

@dtgreiner this looks great, thank you. Just one minor tweak to cover an edge case I can see coming up.