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

[Stephen Tozer via llvm-commits]

SLTozer wrote:

Updated some of the tests according to the review comments, except for the comments that are resolved in #90476. Also added some release notes - I added them to the "debug info" section, but it wasn't clear to me whether that refers to debug info in LLVM's IR (superseding the "LLVM IR" category for debug-info-specific topics), or just debug info produced in objects built by LLVM.

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