[CLI] Support passing the soc-minima, soc-maxima and soc-targets as sensors in the flexmeasures add schedule for-storage

[victorgarcia98]

PR #996 introduced the possibility of defnining the soc-maxima, soc-minima and soc-targets as sensors via the API. Currently, the CLI command flexmeasures add schedule for-storage doesn't support defining any of these fields given the complexity of the resulting command (inline JSON string).

However, with the capabilities that introduced PR #996, we could support passing a sensor ID to define these fields easily.