Initial changes for PL(G) NP template changes

Package Merge Request

Package Changes

• Cleaning up Loki NetworkPolicy templates; fixing labels and selectors, removing kube-api egress since it's not required for Loki.

• Adding kube-api egress NetworkPolicy template for promtail since that is the app in the PLG stack that requires kube-api egress comms

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/loki/-/merge_requests/48

https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/promtail/-/merge_requests/18

For Issue

Closes the annoyance in myself and Micah, and Brandt's heads 🙂 (hopefully the voices stop)