[clang] [clang] Mark CWG2708, CWG2713, CWG2792 as resolved; sync CWG2947 status (PR #191174)

[Vlad Serebrennikov via cfe-commits]

================
@@ -32,7 +32,7 @@
 // RUN: %clang_cc1 -std=c++26 -fsyntax-only -verify %t/cwg2947_ext2.cpp
 // RUN: %clang_cc1 -std=c++26 -fsyntax-only -verify %t/cwg2947_ext3.cpp
 
-// cwg2947: 23 tentatively ready 2026-03-06
+// cwg2947: 23 ready 2026-03-06
----------------
Endilll wrote:

```suggestion
// cwg2947: 23 ready 2026-03-26
```

https://github.com/llvm/llvm-project/pull/191174