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

[via cfe-commits]

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@@ -2393,7 +2393,7 @@ def err_auto_not_allowed : Error<
   "|in type allocated by 'new'|in K&R-style function parameter"
   "|in template parameter|in friend declaration|in function prototype that is "
   "not a function declaration|in requires expression parameter"
-  "|in array declaration}1">;
+  "|in array declaration|in lambda parameter until C++14}1">;
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cor3ntin wrote:

```suggestion
  "|in array declaration|in lambda parameter before C++14}1">;
```

To be consistent with other diagnostics

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