Automatic merge from submit-queue (batch tested with PRs 63315, 63383, 63318, 63439). 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>.
compute configmap/secret key correctly cross-platform
fixes#61710
```release-note
`kubectl create [secret | configmap] --from-file` now works on Windows with fully-qualified paths
```