[clang] [LifetimeSafety] Add report on misuse of clang::noescape (PR #177260)

[Utkarsh Saxena via cfe-commits]

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@@ -553,6 +553,12 @@ def LifetimeSafetySuggestions
     Lifetime annotation suggestions for function parameters that should be marked [[clang::lifetimebound]] based on lifetime analysis.
   }];
 }
+def LifetimeSafetyNoescape
+    : DiagGroup<"lifetime-safety-noescape"> {
+  code Documentation = [{
+    Detects misuse of [[clang::noescape]] annotation where the parameter escapes through return.
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usx95 wrote:

Suggestion to not emphasize return: `Detects misuse of [[clang::noescape]] annotation where the parameter escapes (for example, through return).`

https://github.com/llvm/llvm-project/pull/177260