[libcxx-commits] [libcxx] [libcxx][test][NFC] Fix std::pair convertible tests in light of CWG2137 (PR #97403)

[Louis Dionne via libcxx-commits]

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

Thanks for extracting. Ship it once CI is green.

https://github.com/llvm/llvm-project/pull/97403