[clang-tools-extra] [clang-tidy] rename designated initializers (PR #86976)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> @AaronBallman Ready to go?

Yup, it was already accepted by the code owners. Based on our chat during office hours, I'm guessing you need help landing these changes. I'll go ahead and land them on your behalf. Feel free to let us know if we accept something and you can't land it yourself!

https://github.com/llvm/llvm-project/pull/86976