batches: use custom style for instances of `Select`
Created by: courier-new
Potentially fixes the "doesn't match Wildcard" part of https://github.com/sourcegraph/sourcegraph/issues/37116.
I don't claim to know why we have a "native" version of Select, nor do I know why it's the default, but the "custom" variant looks to be what we want to use to match Wildcard. Screenshots from Safari, like in @danielmarquespt's original report:
Test plan
Manually tested all three instances of Select in Chrome, Brave, and Safari. I think these instances are also covered by Storybook and should probably trigger a diff on Chromatic.
App preview:
Check out the client app preview documentation to learn more.