Fix rejected occurrences tab sorting and pagination

[vincit-matu]

🛠️ Changelog

• Fixes the sorting and pagination of the rejected occurrences listing, shown in a tab under a handled application round which resulted in rejected occurrences

🧪 Test plan

• Sorting by unit name and reservation unit name should now work (along with all the other sorting options)
• Check that the pagination works:
  • If you have an application round which has resulted in over 50 rejected occurrences you can test it by viewing that application round
  • Otherwise: you need to have an application round which has resulted in at least a few rejected occurrences to be able to test this. To avoid having to create over 50 rejected occurrences you can use any smaller value instead of LIST_PAGE_SIZE on line 42 in apps/admin-ui/src/spa/application-rounds/[id]/review/RejectedOccurrencesDataLoader.tsx. This defines the page size to be used in the listing, making testing pagination possible even with a smaller total count.

🎫 Tickets

• TILA-3446