Bring back the expiry date logic

[thekaveman]

We need to "revert the revert" from #2052 when the testing situation with Littlepay QA stabilizes.

Acceptance Criteria

• We can fully test all scenarios (with and without expiration date, with and without re-enrollment) in Littlepay QA
• Expiry logic reverted in Revert "Feat: enrollments can expire (#1989)" #2052 is brought back into dev

Additional context

#1989 was the original PR that implemented the expiry logic.