d64165c803
The implementation should have preserved an existing ephemeral volume source during an update even when the feature gate is currently disabled, but due to a cut-and-paste error it was checking for CSI volumes instead. The new test detected that. It's based on https://github.com/kubernetes/kubernetes/pull/97058/files#diff-7826f7adbc1996a05ab52e3f5f02429e94b68ce6bce0dc534d1be636154fded3