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. --- #### 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