[clang] [clang] Implement lifetime analysis for lifetime_capture_by(X) (PR #115921)

[Boaz Brickner via cfe-commits]

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@@ -3983,6 +3990,21 @@ The attribute supports specifying more than one capturing entities:
     s2.insert(a);
   }
 
+Currently clang would diagnose when a temporary is used as an argument to a
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bricknerb wrote:

Nit: Use "Clang" and not "clang" when referring to it.

https://github.com/llvm/llvm-project/pull/115921