Automatic merge from submit-queue (batch tested with PRs 59637, 60611, 60788, 60489, 60687). 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>.
pkg/volume/nfs/nfs.go: correct error messages
**What this PR does / why we need it**:
We don't use `IsLikelyNotMountPoint()` function since 45d21ee36b commit. This PR updates the error messages to mention a new function instead of the old one.