[llvm] [DebugInfo][RemoveDIs] Convert debug-info modes when loading bitcode (PR #78967)

[Nico Weber via llvm-commits]

nico wrote:

Also broke check-clang when the AMDGPU target was enabled fwiw: http://45.33.8.238/linux/129084/step_7.txt

Thanks for the revert!

https://github.com/llvm/llvm-project/pull/78967