Add endpoints to retrieve metadata (yaml)
In order to make autosubmit-gui#117 possible we need two new endpoints:
-
/v4/experiments/<expid>/filesystem-config
-> return the current filesystem configuration -
/v4/experiments/<expid>/runs/<run_id>/config
-> return the configuration of a run -
/v4/experiments/<expid>/runs
-> return the list of runs of an experiment