Draft: Read proxy vars to be used for bootstrap cluster ('s flux) directly from values.yaml
What does this MR do and why?
Makes use of tools/extractHelmReleaseValues.py to get the proxy values to be used for bootstrap cluster's Flux installation, do drop the need of having them in bootstrap machine's environment.
Related reference(s)
This improvement was seen as valuable by @imgios, a new stack user, in our discussion.