[clang-tools-extra] [clang-tidy] New bugprone-unsafe-format-string check (PR #168691)

[Daniel Krupp via cfe-commits]

https://github.com/dkrupp commented:

@vbvictor @EugeneZelenko thanks for your review. I tried to address your comments.

https://github.com/llvm/llvm-project/pull/168691