🐛 Add kubeapi server access to packageserver network policy

[perdasilva]

Description of the change:

Package server needs kube api access [ref]. This PR updates the network policy to reflect that. It's possible that it worked anyway because the kind CNI doesn't seem to block kube-api server access.

Motivation for the change:

Architectural changes:

Testing remarks:

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Bug fixes are accompanied by regression test(s)
• e2e tests and flake fixes are accompanied evidence of flake testing, e.g. executing the test 100(0) times
• tech debt/todo is accompanied by issue link(s) in comments in the surrounding code
• Tests are comprehensible, e.g. Ginkgo DSL is being used appropriately
• Docs updated or added to /doc
• Commit messages sensible and descriptive
• Tests marked as [FLAKE] are truly flaky and have an issue
• Code is properly formatted

[bentito]

/lgtm