Update the template for BB 3.0 and Operatorless Istio

TODO:

• Update Docs
• Update Config

The pre-3.0 istio deployment (operator) is still present and packages removed from BB 3.0 are also still present/referenced in the default config.

Many URLs still reference: https://repo1.dso.mil/platform-one/big-bang/bigbang.git instead of https://repo1.dso.mil/big-bang/bigbang.git