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

[Nishith Kumar M Shah via cfe-commits]

nishithshah2211 wrote:

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

Noted. Will include a release note, a lexer test and address any other comments for the next commit.

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