Automatic merge from submit-queue (batch tested with PRs 60148, 60022, 59125, 60068, 60154). 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>.

 remove unneeded factory codec methods

Builds on https://github.com/kubernetes/kubernetes/pull/60117, so only the last commit is unique.

After we collapsed onto our own internal scheme for managing conversion and typing, the flexibility in codecs is the next area to collapse.  This pull eliminates those methods from the factory and then removes lots of dead code in the fake factories that supported this un-used flexibility

@kubernetes/sig-cli-maintainers 
@pwittrock @adohe @soltysh looking cleaner all the time.

```release-note
NONE
```