Add conditional endPort printing for NetworkPolicies

[kennedn]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Adds a conditional to the networkpolicy print logic to print information about endPort.

Which issue(s) this PR fixes:

Fixes #123506

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Fixed a bug where `kubectl describe` incorrectly displayed NetworkPolicy port ranges
(showing only the starting port).

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[linux-foundation-easycla]

• ✅login: kennedn / (5fb3ecd)

The committers listed above are authorized under a signed CLA.

[k8s-ci-robot]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kennedn
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[sftim]

Similar to #123316

[sftim]

We avoid referencing issues in commit messages
/retitle Add conditional endPort printing for NetworkPolicies

[sftim]

Changelog suggestion

-Added port range information when describing a NetworkPolicy that had endPort set.
+Fixed a bug where `kubectl describe` incorrectly displayed NetworkPolicy port ranges
+(showing only the starting port).

[mpuckett159]

/ok-to-test

[mpuckett159]

/triage accepted

[k8s-ci-robot]

PR needs rebase.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.