[clang] [llvm] [Clang] Emit DW_TAG_template_alias for template aliases (PR #87623)

[Paul T Robinson via cfe-commits]

https://github.com/pogo59 commented:

The flag situation is good. Tuning influences the default for the new option, which is how we want that to work.

I'm happy, a couple of nits left. I'll leave it to others to do the final approval.

https://github.com/llvm/llvm-project/pull/87623