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

[Matheus Izvekov via cfe-commits]

mizvekov wrote:

@emaxx-google thanks for the reproducer.

I will be off to C++Now soon, so it's unlikely I will have time to take a look at
that in the next two weeks, sorry about that.

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