Sponsorship Dashboard: Add number of PyCon US sponsor voucher registration code uses under Provided Assets

[oliviasauls]

Location of change python.org/users/sponsorships/ - Sponsorship Dashboard - individual sponsorship dashboard page, “Provided Assets” and us.pycon.org

Describe the solution you'd like Indicating the number of uses/redemptions and/or the number of remaining uses left of PyCon US sponsor registration voucher codes

Reason for change Sponsors had a hard time remembering how many of each code they received as well as how many uses of each code they had used vs. unused

Priority 2. Medium

Date Needed Sponsorship Launch

Additional context