Support policy/v1 for PodSecurityPolicy for v1.21+

[xval2307]

Remove warning of policy/v1beta1 deprecation

Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+; use policy/v1 PodSecurityPolicy

Reference:

• https://kubernetes.io/docs/reference/using-api/deprecation-guide/#psp-v116

[linux-foundation-easycla]

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[mwielgus]

/lgtm
/approve

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