[clang] clang: Relax LangOpts checks when lexing quoted numbers during preprocessing (PR #95798)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

The changes should come with a release note in clang/docs/ReleaseNotes.rst so users know about the fix.

The changes otherwise look correct, but I'd like to hear from @jansvoboda11 as well (especially in light of the question I raised on the original PR).

https://github.com/llvm/llvm-project/pull/95798