[clang] [alpha.webkit.NoDeleteChecker] Don't emit a warning for a function without annotation. (PR #178824)

[Balázs Benics via cfe-commits]

================
@@ -70,6 +70,12 @@ class NoDeleteChecker : public Checker<check::ASTDecl<TranslationUnitDecl>> {
       return;
 
     bool HasNoDeleteAnnotation = isNoDeleteFunction(FD);
+    for (auto* D = FD->getPreviousDecl(); D; D = D->getPreviousDecl()) {
+      if (isNoDeleteFunction(D)) {
+        HasNoDeleteAnnotation = true;
+        break;
+      }
+    }
----------------
steakhal wrote:

```suggestion
    bool HasNoDeleteAnnotation = any_of(FD->redecls(), isNoDeleteFunction);
```

https://github.com/llvm/llvm-project/pull/178824