[clang] [clang] Introduce "binary" StringLiteral for #embed data (PR #127629)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

Thanks for this! It also needs a release note for the fix. :-)

In general, I think this seems reasonable, but I'd like confirmation from @cor3ntin given his somewhat recent thinking about unevaluated string literals and where those end up touching the rest of the compiler.

https://github.com/llvm/llvm-project/pull/127629