Automatic merge from submit-queue

[client-gen]Add Patch to clientset

* add the Patch() method to the clientset. 
* I have to rename the existing Patch() method of `Event` to PatchWithEventNamespace() to avoid overriding.
* some minor changes to the fake Patch action.

cc @Random-Liu since he asked for the method
@kubernetes/sig-api-machinery 

ref #26580 

```release-note
Add the Patch method to the generated clientset.
```