[clang] [clang] Implement CWG2815 (PR #132778)

[via cfe-commits]

================
@@ -110,12 +110,16 @@ Resolutions to C++ Defect Reports
   two releases. The improvements to template template parameter matching implemented
   in the previous release, as described in P3310 and P3579, made this flag unnecessary.
 
+- Implemented |CWG2815|_
----------------
cor3ntin wrote:

Can you use a simple link as done just below?

https://github.com/llvm/llvm-project/pull/132778