[clang] [clang] [CodeGen] fix crash when Ty isDependentType in CodeGenFunction::EmitAutoVarAlloca (PR #135643)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

Also, if you're okay with publicly posting your code, it's fine to file a bug with an unreduced testcase.

https://github.com/llvm/llvm-project/pull/135643