Draft: Resolve "Root issues and stage-out with SPANK"

Open Ramon Nou requested to merge rnou/163-dataclay-integration into main

At the end, stage-out in root installation was never implemented, so this merge request does it:

  1. Stage-in (and waiting until copy happens, bool in trasfer_datasets)
  2. Stage-out (and waiting until copy happens)
  3. terminates adhoc fs
  4. removes adhoc fs directory.

Some issues with needed environment variables solved, however LIBGKFS_HOSTS_FILE and GKFS_DAEMON and GKFS_CLIENT should be defined in the environment as they are installation dependant.

Edited by Ramon Nou

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