dev/ci: annotate failures with test summary

Created by: bobheadxi

Annotate builds with go test failures using @jhchabran 's gorich fork, which gives us more configuration on filtering log lines to get a nice tidy summary

This unfortunately hides assertion failures, but I think it's better than nothing for now!

Closes https://github.com/sourcegraph/sourcegraph/issues/30115

Test plan

https://buildkite.com/sourcegraph/sourcegraph/builds/135125