pkg/gcp/gcs: RsyncRecursive doesn't need to run against normalized paths
pkg/gcp/gcs: RsyncRecursive doesn't need to run against normalized paths

`gsutil rsync` doesn't actual require that either of the specified
directories be GCS paths, so here we remove that requirement.

Signed-off-by: Stephen Augustus <f96984fef9637085f0559f1484dfd4e99545cd6e@vmware.com>

kubernetes/release,kubernetes/release