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

[Maksim Ivanov via cfe-commits]

emaxx-google wrote:

Hello, the minimized reproducer for the determinism issue is there: https://pastebin.com/6aL6rmBe . To build it, unpack it into separate files (via `split-file`), then run `CLANG=path/to/clang make`. The nondeterminism can be checked by looping `make clean` + `make` + `md5sum problem.pcm` - typically a different hash pops up after a few dozens of iterations.

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