Add missing columns to gwctl get policycrds

[jongwooo]

What type of PR is this?

/kind feature
/area gwctl
/cc @gauravkghildiyal

What this PR does / why we need it:

Add missing columns to gwctl get policycrds.

Output Columns	Description	Visibility
NAME	Name of the Policy CRD in the form <kind.group>
POLICY TYPE	Type of policy defined by the CRD (Inherited or Direct)
SCOPE	Scope of the policy (Namespaced or Cluster)
POLICIES COUNT	Count of policy resources of this particular type.	-o wide
AGE	Age of the Policy CRD

Which issue(s) this PR fixes:

Fixes #2810

Does this PR introduce a user-facing change?:

Add missing columns to `gwctl get policycrds`

[gauravkghildiyal]

/assign

[jongwooo]

I'll work on this once #2808 is merged.

[gauravkghildiyal]

Thanks @jongwooo

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gauravkghildiyal, jongwooo

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