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

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eaeltsin wrote:

We are now seeing non-determinism in `.pcm` files that root-causes to this commit.

@mizvekov - might it be something obvious, like pointer-keyed containers or similar?


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