[libcxx-commits] [libcxx] [libc++][test] Migrate _BitInt probe to __BITINT_MAXWIDTH__ and fix latent test bugs (PR #203876)

[Xavier Roche via libcxx-commits]

xroche wrote:

:information_source: The format failing job is expected :crying_cat_face: 
See https://github.com/llvm/llvm-project/pull/203876#discussion_r3417790091

https://github.com/llvm/llvm-project/pull/203876