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

[David Blaikie via cfe-commits]

dwblaikie wrote:

Not quite sure how we get to caching and template specializations and pretty printers.

If we're still producing the typedef-style DWARF for these alias template specializations - perhaps lldb could not cache pretty printers for typedefs? (I guess the pretty printers shouldn't be typedef-specific, right, since typedefs are transparent anyway - but I guess maybe pretty printers can be typedef-specific because typedefs can be intended to communicate what kind of a thing is and possibly how to render it?) - it'll cache teh pretty printer for the underlying type anyway, yeah?

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