Add NPs for Gatekeeper

Package Owner Merge Request

Package Changes

https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/merge_requests/26

https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/releases/3.4.0-bb.7

Adds network policies for gatekeeper.

Additional Details

No known issues.

Closes #437