Let's come up with a better solution to cloud build locally

[balopat]

See #121 for more details where this came up.

In the "local emulation" of the cloud build a python script is pulled in from the python runtime - which is not an ideal solution necessarily - especially that the old version (the one I switched back to) worked, the new version doesn't, as it got modularized in this commit .

Let's find a better way to emulate cloud build locally!

Options might be:

1. "curl" all of the dependent scripts in at runtime (ugly)
2. write our own fork of these scripts
3. lift these "cloud-scripts" into a separate projects which could be reused across runtime projects?