Write range sync tests in external event-driven form

[dapplion]

Issue Addressed

Re-write existing range sync tests into an event-driven format to accommodate the refactor introduced in

• Add individual by_range sync requests #6497

This format was introduced in

• Event-based block lookup tests #5534

and does not make assumptions about internal functions, it treats sync as a black box inputting actual events used in production.

Note: I've removed the generics used in range sync since now we don't unit test directly