[clang-tools-extra] [clang-tidy] performance-unnecessary-copy-init: Add a hook... (PR #73921)

[Clement Courbet via cfe-commits]

legrosbuffle wrote:

This is ready for another look. I took this as an opportunity to refactor the duplicated parts of the code. Let me know what you think.

https://github.com/llvm/llvm-project/pull/73921