[clang] [clang-tools-extra] [lldb] Reland: [clang] preserve class type sugar when taking pointer to member (PR #132401)

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eaeltsin wrote:

Patched #135450 but still see the same MSan finding on my compilation - uninitialized value while checking location validity in `TranslateSourceLocation` called from `VisitSubstNonTypeTemplateParmExpr`.

Sorry but I'm not yet sure how to strip the reproducer from internal code so cannot provide it :|


https://github.com/llvm/llvm-project/pull/132401