Incorporate building the CNG environment in CPT by maybe passing an Environment var to CPT

Enable CPT to create a CNG environment in a seperate VM by passing an environment var say RUN_ON_CNG

RUN_ON_CNG=true : CPT would create a CNG environment and run the k6 tests agains that environment

RUN_ON_CNG=false : this would be the default value. When false the behaviour will be BAU. CPT will require a docker compose file which says which service to spin up. CPT will spin that service up and run k6 tests against it.