DEBUG, SKIP UPDATE CHECK, SKIP UPGRADE Adding Istio configuration for Big Bang

Issue

• Closes https://repo1.dso.mil/platform-one/big-bang/apps/third-party/rapidfort/-/issues/5

Summary

• Followed steps in this guide --> https://repo1.dso.mil/platform-one/big-bang/bigbang/-/blob/master/docs/developer/package-integration/package-integration-service-mesh.md
• Added chart/templates/_helpers.tpl that defines a fullname template for rapidfort and for any future templates