Helm Tests Egress

When Cypress Tests run in BigBang, they utilize the Istio Domain *.bigbang.dev. The cypress tests using harbor.bigbang.dev needs to be allow the network policy for egress to this domain.

Add this file to the network policies: https://repo1.dso.mil/big-bang/product/packages/neuvector/-/blob/main/chart/templates/bigbang/networkpolicies/egress-helm-tests.yaml