[clang] [clang-tools-extra] [llvm] Reland: [clang] Improved canonicalization for template specialization types (PR #135414)

[Matheus Izvekov via cfe-commits]

mizvekov wrote:

Thanks, yeah this relanding was just to try to get LLDB CI up and running, which I am still trying.

https://github.com/llvm/llvm-project/pull/135414