Merge pull request #46055 from deads2k/crd-01-embed
Automatic merge from submit-queue (batch tested with PRs 46022, 46055, 45308, 46209, 43590)
embed kube-apiextensions inside of kube-apiserver
To reduce operation complexity, we decided to include the kube-apiextensions-server inside of kube-apiserver (https://github.com/kubernetes/community/blob/master/sig-api-machinery/api-extensions-position-statement.md#q-should-kube-aggregator-be-a-separate-binaryprocess-than-kube-apiserver). With the API reasonably well established and a finalizer about merge, I think its time to add ourselves.
This pull wires kube-apiextensions-server ahead of the TPRs so that one will replace the other if both are added by accident (CRDs should have priority) and wires a controller for automatic aggregation.
WIP because I still need tests: unit test for controller, test-cmd test to mirror the TPR test.
```release-note
Adds the `CustomResourceDefinition` (crd) types to the `kube-apiserver`. These are the successors to `ThirdPartyResource`. See https://github.com/kubernetes/community/blob/master/contributors/design-proposals/thirdpartyresources.md for more details.
```
bb56937b92