[clang-tools-extra] [NFC] Complete proper copying and resource cleanup in classes. (PR #118655)

[Zahira Ammarguellat via cfe-commits]

zahiraam wrote:

Thanks @AaronBallman . I think it makes more sense to have `=delete` instead of `=default`. I changed them. @HerrCai0907 what do you think of these changes? If you think they are useless we can consider these a false positive from the analyzer and ignore them all together.

https://github.com/llvm/llvm-project/pull/118655