chore: add `configuration` field to the PolicyReport APIs

[kumar-mallikarjuna]

Issue

• Closes #117

Changes

• Added the configuration field v1beta1 PolicyReport and ClusterPolicyReport APIs.
• Bumped the Go and Kubernetes versions.
• Updated docs.

cc: @anusha94 , @JimBugwadia

[anusha94]

@kumar-mallikarjuna Can you also add this new field example to this file? https://github.com/kubernetes-sigs/wg-policy-prototypes/blob/master/policy-report/samples/sample-v1beta1-kyverno.yaml

[JimBugwadia]

/lgtm /approve

[k8s-ci-robot]

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This pull-request has been approved by: JimBugwadia, kumar-mallikarjuna

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