[clang-tools-extra] [clang-tidy] `modernize-use-trailing-return-type`: add an option to apply to `void`-returning functions as well (PR #129406)

[Baranov Victor via cfe-commits]

https://github.com/vbvictor approved this pull request.

LGTM, few nits

https://github.com/llvm/llvm-project/pull/129406