Automatic merge from submit-queue

Refactor E2E framework & utils to test/e2e/framework package

Refactor E2E framework & utils to test/e2e/framework package to pave the way for further refactoring and code sharing with the node e2e suite.

I've split this PR into 2 commits to try to make it more manageable: The first moves the code to the framework package (which builds on it's own), and the second fixes the test/e2e package. Unfortunately the code is so tangled up that moving it all at once this way is much easier than separating out individual pieces. Although the separation would probably be a worthwhile exercise on it's own, the goal here is to unblock the e2e_node hackathon.

One way I could reduce the number of changes is by importing the framework package as `.`. I didn't do this since I think it's not great practice - but I'm open to making this change if you (reviewers) think otherwise.

LMK if there's any way I can help to make this more reviewable.

@kubernetes/sig-node @kubernetes/sig-testing @vishh @pwittrock @jayunit100