* fix(e2e): Refactor e2e utils and resource actions
brings commonly re-used utilities into lib/test so they can be resused
and e2e can be run selectively for eventing/serving.
* Refactor service and revision e2e test utils into test lib
* Docstrings for exported e2e test utils
* (refactor) address the e2e extract / refactor of issue #763
* various updates to address reviewers feedback
* renamed lib/test/integration to lib/test and package to test