codeintel-qa: Add `pg_dump` to output
Created by: efritz
Print pg_dump of relevant tables when the codeintel-qa pipeline fails. I'm not sure if pg_dump is available on the buildkite host correctly, but this is just a temporary measure to sanity check our data.
Test plan
We just print the error if this isn't set up correctly - should not affect the codeintel-qa pipeline negatively.