[clang] [Sema]Use tag name lookup for class names (PR #112166)

[via cfe-commits]

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@@ -151,6 +151,8 @@ C++ Language Changes
 - The builtin type alias ``__builtin_common_type`` has been added to improve the
   performance of ``std::common_type``.
 
+- During the lookup for a base class name, non-type names are ignored.
+
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Sirraide wrote:

This shouldn’t be here since this is a bug fix. There’s a ‘bug fixes to c++ support’ section or whatever it was called below where this should go.

https://github.com/llvm/llvm-project/pull/112166