[clang] [clang-tools-extra] Revert "[clang] improve class type sugar preservation in pointers to members" (PR #132215)

[Vlad Serebrennikov via cfe-commits]

Endilll wrote:

> This missed updating lldb, which we didn't notice due to lack of pre-commit CI.

This is unfortunate, because lack of lldb testing on clang changes was a temporary measure that has been in effect for 8 months at this point (#95537).

https://github.com/llvm/llvm-project/pull/132215