[clang] Thread safety analysis: Fix a bug in handling temporary constructors (PR #74020)

[Aaron Puchert via cfe-commits]

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@@ -1718,6 +1720,13 @@ struct TestScopedLockable {
     MutexLock{&mu1}, a = 5;
   }
 
+  void temporary2(int x) {
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aaronpuchert wrote:

I would suggest a speaking name for the test, like `temporary_cfg`.

https://github.com/llvm/llvm-project/pull/74020