[Improvement] Green Software Foundation SCI calculation

[ArneTR]

Currently the SCI calculation in the Green Metrics Tool has some limitations:

• The SCI is only calculated for the total [RUNTIME] phase
  • This should be improved to have it separately for every phase
• It is not immediately visible which variables have been used to derive the score. They are all present in the interface, but in various and undocumented locations
  • The I, M etc. parameters are under the Machine Tab
  • The R values are in the logs tab. Which is also deleted after a certain retention period (TBD: in the future)
  • See screenshots for both locations as example
• Technically the SCI is currently handed over internally as variable. It would however be more consistent if the SCI is an actual reporter that would depend on a machine energy reporter and a CO2-grid-intensity reporter to be present
• The R-Values have to come from the application itself though. Currently we use a buffered output stream from the container to the host OS which is then parsed for the variables. It would be better however to have a pre-defined output location inside of the container, something like /tmp/green-metrics-tool/sci/R.log that the user can send these values in the instrumented application to. The gain here is that the stdout is not overloaded and the unnecessary noise is not captured on top.

Screenshots of SCI and location