HPCC-10803 Support logical files present on more than one cluster

Fixes HPCC-10803

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5710 from GordonSmith/HPCC-10803

HPCC-10803 Support logical files present on more than one cluster

Reviewed-By: Kevin Wang <kevin.wang@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>