[clang] [clang-tools-extra] [libcxx] [lldb] Fix vector types w.r.t. qualified element type. (PR #197624)

[Michele Scandale via cfe-commits]

michele-scandale wrote:

Based on the feedback from https://github.com/llvm/llvm-project/pull/197624 I'm going rework this to avoid changing the signature of `getUnqualifiedType` and related functions.

https://github.com/llvm/llvm-project/pull/197624