[NFC][CI] Move UR benchmarking scripts to devops/scripts (#17562)

Given that #17229 is massive, I am
splitting the PR into smaller individual PRs such that reviewers would
have an easier time. This PR prepares for changes in
#17229 by moving the UR benchmarking
scripts into devops.

For more context: A previous attempt at splitting is here
#17545, but even this is way too big,
and thus I'm splitting it into chunks.

This is a non-functional change, as these scripts not currently used
anywhere right now... hopefully soon though!

Author: ianayl