[clang] [analyzer] Don't invalidate the super region when a std object ctor runs (PR #100405)

[Donát Nagy via cfe-commits]

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@@ -923,12 +923,31 @@ SVal AnyCXXConstructorCall::getCXXThisVal() const {
   return UnknownVal();
 }
 
+static bool isWithinStdNamespace(const Decl *D) {
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NagyDonat wrote:

I think this function could be useful for other checkers as well; consider moving this to an externally visible location (e.g. turn this into a method of `Decl`).

https://github.com/llvm/llvm-project/pull/100405