Automatic merge from submit-queue (batch tested with PRs 60632, 60806, 59471, 61251, 61013). 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>.
add --from-literal --from-file docker-reg secret
**Release note**:
```release-note
NONE
```
Related downstream issue https://github.com/openshift/origin/issues/18833
Adds `--from-file` and `--from-literal` flag support to `kubectl create secret docker-registry`.
These flags have the same behavior as their counterparts in `kubectl create secret generic`.
cc @bparees @soltysh
32858f98b3