Automatic merge from submit-queue (batch tested with PRs 63138, 63091, 63201, 63341). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Enable bypassing online checks in kubeadm upgrade plan
Signed-off-by: Chuck Ha <ha.chuck@gmail.com>

**What this PR does / why we need it**:

This PR makes `kubeadm upgrade plan` a little nicer to use in an air gapped environment. `kubeadm upgrade plan` now accepts a version and returns that instead of checking the internet.

**Which issue(s) this PR fixes**:

Fixes kubernetes/kubeadm#698

**Special notes for your reviewer**:

I also cleaned up the tests for this section of code by adding formal names for table tests and using `t.Run`.

**Release note**:

```release-note
`kubeadm upgrade plan` now accepts a version which improves the UX nicer in air-gapped environments.
```