[clang-tools-extra] [clang-tidy] Fix bug in modernize-use-emplace (PR #66169)

[Piotr Zegar via cfe-commits]

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

Overall LGTM, check comments, and verify if check shouldn't be made more strict.

https://github.com/llvm/llvm-project/pull/66169