Merge pull request #65952 from luxas/kubeadm_init_join_exclusive
Automatic merge from submit-queue (batch tested with PRs 63877, 64559, 65952). 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>.
kubeadm: Make the kubeadm config kinds mutually exclusive
**What this PR does / why we need it**:
Right now it would be possible to feed kubeadm with a YAML document with all the four different Config kinds kubeadm at HEAD supports, `MasterConfiguration`, `InitConfiguration`, `JoinConfiguration` and `NodeConfiguration`. This PR makes them mutually exclusive so that kubeadm can know how to handle the config file properly.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
ref: kubernetes/kubeadm#911
Depends on:
- [x] https://github.com/kubernetes/kubernetes/pull/65776
- [x] https://github.com/kubernetes/kubernetes/pull/65628
- [x] https://github.com/kubernetes/kubernetes/pull/65629
- [x] https://github.com/kubernetes/kubernetes/pull/65631
- [x] https://github.com/kubernetes/kubernetes/pull/65940
- [x] https://github.com/kubernetes/kubernetes/pull/65787
- [x] https://github.com/kubernetes/kubernetes/pull/65945
- [x] https://github.com/kubernetes/kubernetes/pull/65951
**Special notes for your reviewer**:
Please only review the last commit
**Release note**:
```release-note
NONE
```
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