[llvm] [RemoveDIs] Load into new debug info format by default in LLVM (PR #89799)

[Orlando Cazalet-Hyams via llvm-commits]

https://github.com/OCHyams commented:

Once my inline comments are addressed I'm happy to approve this - I've converted the FIXME-tests that can/should be upgraded in #90476, which can land after this does.

https://github.com/llvm/llvm-project/pull/89799