[clang] Reapply "[clang] Fix name lookup for dependent bases" (PR #118003)

[Vladislav Belov via cfe-commits]

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@@ -1178,17 +1178,61 @@ namespace cwg590 { // cwg590: yes
   template<typename T> typename A<T>::B::C A<T>::B::C::f(A<T>::B::C) {}
 }
 
-namespace cwg591 { // cwg591: no
+namespace cwg591 { // cwg591: yes
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vbe-sc wrote:

Done

https://github.com/llvm/llvm-project/pull/118003