Description

Today, one can already define in the manifest.toml file of a testplan builder-args for a docker:generic builder.

It is however not yet possible to define args that can be given to the local:docker runner when running an already built image.
As a result it is currently only possible to add dynamic features to a Generic dockerfile using build args, rather than also
supporting args that can be injected without having to rebuilt the image.

If we can support this it can make ourdocker:generic images a lot more flexible.