refactor: use expResult in acknowledgePacket tests (#4439) (#4472)

* refactor: use `expResult` in acknowledgePacket tests (#4439)

* refactor: adapt acknowledgePacket tests to use expResult func

* cleanup: removing redundant stale tests

* fix: assert ErrInvalidProof for verification failure. modify suite.Run tc naming

* fix: lint

* refactor: refactor test to use path port and channel for commitment lookup and add extra assertions in cases

* chore: adding in-line comment for unsent and already relayed packets