Recently for SERVER-104636 and SERVER-104645, I needed to update the query shape hashes for many many of the queries in the query-correctness-test repos. This was rather arduous because the repos are so large they take a long time to clone locally, and the tests take a long time to run.

Since in my case I had run these tests in evergreen, there were diffs in the log files there that contained the new hashes. What if we were to:

• add a git-formatted diff file to the artifacts produced by the evergreen task. This diff could then just be applied to a local repository to get the changes for updating the hashes.
• Even more useful would be to automate things further and create a branch in the relevant query-correctness-tests repository on GitHub with a diff link to easily create a PR that updates the new expected outputs.