Draft: Resolve "Add custom network policies"

General MR

Summary

We need a way for consumers to be able to add in their own flavors of network policies at the values-level by either establishing a way for them to add the policies at the package level or at the big bang template level.

Gitlab-Runner is one of the packages that currently supports this feature by allowing consumers to add in additional policies via gitlabRunner.values.networkPolicies.additionalPolicies

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Linked Issue

issue

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