Deduplicate github action logs

[redmoogle]

Deduplicate the logs

Fixes: #1778

only prints off the warnings from the ubuntu-latest run.

This is very slightly hacky but only matters for 1 warning (CA1416)

[redmoogle]

will do some testing on my fork later 9actions are alot more fucky than I thought)

[wixoaGit]

Another possible approach could be to use the ::remove-matcher workflow command according to this documentation. I think how it would be used here would be to do echo "::remove-matcher owner=csc::" on non-ubuntu runners.