[clang-tools-extra] [clang-tidy] Add check 'bugprone-unsafe-to-allow-exceptions' (PR #176430)

[Donát Nagy via cfe-commits]

https://github.com/NagyDonat commented:

Thanks for  implementing the changes that I suggested!

>From my previous review the only question that remains is the open-ended one about the naming/role of the option `CheckedSwapFunctions`.

I also spotted one annoying little syntax error in the RST docs (see inline comment).

https://github.com/llvm/llvm-project/pull/176430