[clang] [Clang] Fix dependent local class instantiation bugs (PR #134038)

[Matheus Izvekov via cfe-commits]

mizvekov wrote:

Can you send reproducer and / or stack trace?

FYI you can use `CLANG_CRASH_DIAGNOSTICS_DIR` environment variable to make clang put these automatically generated reproducers up in a directory which will have its contents exported as artifacts.

https://github.com/llvm/llvm-project/pull/134038