* Refactoring to prepare remote message sending

* Send remote messages

* Move protolens message utilities to wire-api

* Add end2end test sending and receiving a message

* add withTempServantMockFederator to utils

* add empty mock api

* Implement Servant-based proteus mock function

* assertMismatchQualified: add failed to send

* success test: use servant mock

* test case missing clients: use servant mock

* test case missing and redundant: use servant mock

* throw ServantError if mock is not implemented

* test case ignore missing clients: use servant mock

* add test case: failed to send

* Update CHANGELOG

* Refactor sendMessages and avoid extra flattening

Co-authored-by: Stefan Matting <stefan@wire.com>