start UP031 by fixing simple %s strings

[RayBB]

Part of #10196

Before embarking on a journey to fix (or ask people to open many PRs) all of the issues I decided to open a PR with some of the simple fixes.

These were all suggested as "unsafe" fixes by ruff. They're unsafe because if the value was a tuple instead of a string then the f string behaves slightly differently. However, I've examined each of these examples pretty closely and don't see any cases where a tuple is likely to slip in.

Technical

https://docs.astral.sh/ruff/rules/printf-string-formatting/

Testing

I've clicked around on much of the site locally and didn't hit any errors but I didn't extensively check that all the code changed is triggered.

Screenshot

Stakeholders

[mekarpeles]

Just wanted to confirm that we used --fix (with no unsafe substitutions)

If so, happy to merge, thank you!

[RayBB]

@mekarpeles these are small subset of the changes made with the --unsafe-fixes flag that I have checked closely.
When you use that flag they offer many different fixes using .format and the like but I just picked out a set of the simplest ones.
As mentioned in the docs they only reason it's "unsafe" is because they can't know if the value is a tuple or not.
I've examined each of these cases to check if a tuple could get passed in and I don't see any case where anything but a string/int would be coming in.