[clang] [llvm] [clang][CodeGen] Fix templated constructors in base classes introduce bugs. (PR #87310)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

If you don't like the current rules, you can ask the C++ standard committee to change them.  (See https://isocpp.org/std/submit-issue .)

https://github.com/llvm/llvm-project/pull/87310