Removed PersistentVolumeLabel from apiserver to fix below warning.
Deprecated warning:
1. PersistentVolumeLabel admission controller is deprecated.
Please remove this controller from your configuration files and scripts.
2. insecure-port has been deprecated, This flag has no effect now
and will be removed in v1.24.
Change-Id: Iaccff8467b5ed967fa41e85b38c27f7345cd97bb