Update safety based on O3a HVeto results

This PR updates channel safety based on O3a Hveto safety studies documented here:

https://dcc.ligo.org/DocDB/0163/G1901988/003/O3a-hveto-safety.pdf

https://ldas-jobs.ligo.caltech.edu/~derek.davis/detchar/O3/veto_safety/Channel_comparison-changes_to_lists.html

Additional changes, provisional on additional investigations, may be added in a separate PR.