[clang] [clang][Sema] Emit more specific diagnostic for auto in lambda before C++14 (#46059) (PR #68540)

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https://github.com/cor3ntin approved this pull request.

A small nit, otherwise LGTM

I'm not sure it's strictly necessary here, but you could add a release note in clang/docs/ReleaseNotes.rst - under the diagnostics improvement section

https://github.com/llvm/llvm-project/pull/68540