SKIP UPGRADE gatekeeper update to 3.15.0-bb.4

Package Merge Request

SKIP UPGRADE added, since the current version is broken.

Kubernetes 1.29 upgrade was causing issues with the cypress tests.

Made some changes to the test yaml scripts, so they install and work with the tests.

Package Changes

https://repo1.dso.mil/big-bang/product/packages/policy/-/blob/3.15.0-bb.4/CHANGELOG.md

Package MR

big-bang/product/packages/policy!220 (merged)

For Issue

Closes big-bang/product/packages/policy#217 (closed)

Upgrade Notices

N/A