We have multitple different pager interfaces that all utilize the same (effective) set of functions. This change reduces those to two different interfaces: a delta- and non-delta- pair of pagers.
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#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🧹 Tech Debt/Cleanup
#### Issue(s)
* #3989
#### Test Plan
- [x] ⚡ Unit test
- [x] 💚 E2E