Reduce EOS free space query load
Now that we have the DISK_INSTANCE
and DISK_INSTANCE_SPACE
tables in the catalogue, tapeservers can use it to store the available FREE_SPACE
there. This way, instead of each of them querying the EOS instance every X seconds, they can obtain the most recent value from the catalogue and avoid querying the instance if it is a recent value.
This was first detailed here: https://gitlab.cern.ch/cta/CTA/-/issues/1088