[CHORE] refactor: Remove runloop usage in integration tests for store…

…/ find All module (#6712)

* chore: refactor: Remove runloop usage in integration tests for store (findAll module)

* chore: refactor: Remove setTimeout when not needed

* chore: refactor: Update test to wait for all promises to be resolved and remove duplicated expectation that doesn't seem required

* chore: refactor: Remove dependency on microtask execution

* chore: refactor: Wait for all internal promises to be resolved to fix tests in 3.8