[clang] [LifetimeSafety] Warn on incorrectly placed `[[clang::lifetimebound]]` attributes (PR #196144)

[Gábor Horváth via cfe-commits]

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@@ -624,6 +624,13 @@ Warning to detect invalidation of references.
   }];
 }
 
+def LifetimeSafetyLifetimeboundViolation : DiagGroup<"lifetime-safety-lifetimebound-violation"> {
+  code Documentation = [{
+Detects parameters marked as [[clang::lifetimebound]] for which we could not verify that the return value can be lifetime bound to them.
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Xazax-hun wrote:

```suggestion
Detects parameters marked as [[clang::lifetimebound]] for which the analysis could not verify that the return value can be lifetime bound to the parameter.
```

https://github.com/llvm/llvm-project/pull/196144