[Clang] fix nested-name-specifier error recovery with ordinary lookup fallback results (#181828) Fixes #181470 --- This patch addresses the regression caused by f3dcec0ee73fee6a33fcfb422e04297e4d466de6. The assertion occurs when nested-name-specifier error recovery tries to extend a nested name specifier with a result found via ordinary lookup fallback https://github.com/llvm/llvm-project/blob/75aa83c0c035a7a10f0f48355c93858f003b8e4e/clang/lib/Sema/SemaCXXScopeSpec.cpp#L725-L728 which can hit `getTypeDeclType` qualifier assertions https://github.com/llvm/llvm-project/blob/75aa83c0c035a7a10f0f48355c93858f003b8e4e/clang/lib/Sema/SemaCXXScopeSpec.cpp#L420 https://github.com/llvm/llvm-project/blob/4f92cf9599c4077c08b7fac0a21624e55da572f9/clang/lib/AST/ASTContext.cpp#L5162-L5176
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