Draft: Fix test_data_reco.sh input file lookup
In my testing it seems that after !76201 (merged) the input file that is passed in via explicit arguments, rather than being taken straight from ART are incorrectly unpacked. The actual path is an absolute path on CVMFS, which the script then somehow tries to convert to a relative path to where auto-downloaded ART inputs would be, possibly.
fyi @tstreble