[clang-tools-extra] [clang-tidy] Fix modernize-use-integer-sign-comparison comparison (PR #121506)

[Piotr Zegar via cfe-commits]

https://github.com/PiotrZSL commented:

Missing:
- Documentation entry to tell user about this behavior

To be considered:
- Configuration option to enable/disable this behavior

https://github.com/llvm/llvm-project/pull/121506