[llvm] [DebugInfo] Move `codeview::SourceLanguage` enumerators to CodeViewLanguages.def (NFC) (PR #141750)

[Javier Lopez-Gomez via llvm-commits]

jalopezg-git wrote:

> @jalopezg-git Have you solved your permission access?

No nows yet; apparently, it's taking a bit long.  @CarlosAlbertoEnciso, could you merge this on my behalf?

https://github.com/llvm/llvm-project/pull/141750