[CS] Remove Immutant for deploys

With Hermes being deployed to a different infrastructure, the requirement for it to be run within an Immutant setup is gone. This allows us to remove that indirection and more directly run the code.

* For deploying on VIP, directly run Hermes without the immutant-docker dance.
* Remove dependency on "env-configs" and make configs baked in at runtime.
* Remove old scripts