[clang] [clang][DebugInfo] Revert to printing canonical typenames for template aliases (PR #110767)

[Adrian Prantl via cfe-commits]

https://github.com/adrian-prantl approved this pull request.

Sounds unfortunate, but if you think that's the best choice for unblocking libc++, let's do that.

https://github.com/llvm/llvm-project/pull/110767