The enum constants are not namespaced. The shorter, unspecifc names are likely
to cause naming conflicts in the future.
Also replace "SandBox" with "Sandbox" in the API.
Per discussion on https://github.com/kubernetes/kubernetes/issues/33873.
Currently the mount name is not being used and also involves some
incorrect usage (sometimes it's referencing a mount name, sometimes
it's referecing a volume name), so we decide to remove it from CRI.
The port name is also not used, so remove it as well.
