Automatic merge from submit-queue (batch tested with PRs 62911, 63200). 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>.

stop duplicating preferred version order 

`GroupMeta` includes two fields for a preferred groupVersion, `.GroupVersion` and `.GroupVersion[0]`.  This collapses onto the latter.

@kubernetes/sig-api-machinery-pr-reviews 

lots of ripples, but eliminate of duplication is good.
/assign @sttts 
/assign @cheftako 


```release-note
NONE
```