feat(workflows): e2e matrix, avoid version skew for kubectl

[weisdd]

Two changes around e2e-tests:

• Till this day, we've been using a deprecated version of k8s in our e2e tests. Instead, I suggest to start running tests against the currently supported k8s versions. If you think it's not required at this point, we should at least bump kind version;
• To avoid version skew for kubectl, I added a step to install client version matching server version.

NOTE: there's a required check on this repository that expects end-to-end job to report its status. Unfortunately, when using name overrides through name field (or it could also be that it had to do with matrix), even though all checks successfully pass, GitHub still shows as if it's waiting for end-to-end job to report its status. Since I don't have enough permissions to experiment with settings, I simply added a placeholder job with end-to-end name to make sure all required checks pass. Please, let me know if you know how to make it better.