[clang] [clang] Implement CWG2428 "Deprecating a concept" (PR #92295)

[Vlad Serebrennikov via cfe-commits]

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@@ -10698,7 +10698,7 @@ <h2 id="cxxdr">C++ defect report implementation status</h2>
     <td><a href="https://cplusplus.github.io/CWG/issues/1815.html">1815</a></td>
     <td>CD4</td>
     <td>Lifetime extension in aggregate initialization</td>
-    <td class="unreleased" align="center">Clang 19</td>
+    <td class="full" align="center">Yes</td>
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Endilll wrote:

I updated the branch from `main`, now with #92113 changes. Unrelated changes are gone.

https://github.com/llvm/llvm-project/pull/92295