Known pulsar pipeline: fix how generated files are copied
In the known pulsar pipeline it can be set to copy files such as the heterodyned data products to the final results web directory. When running the pipeline in quasi-online mode this file copying was failing due to the parent/child processes not being set correctly in the HTCondor DAG file. This MR fixes that issue.
This MR should follow (or just supercede) !824 (merged) as it contains the changes from that MR.