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

[Arthur Eubanks via llvm-commits]

aeubanks wrote:

```
Global is external, but doesn't have external or weak linkage!
ptr @_ZN5clang12ast_matchers8internal18makeAllOfCompositeINS_8QualTypeEEENS1_15BindableMatcherIT_EEN4llvm8ArrayRefIPKNS1_7MatcherIS5_EEEE
function declaration may only have a unique !dbg attachment
ptr @_ZN5clang12ast_matchers8internal18makeAllOfCompositeINS_8QualTypeEEENS1_15BindableMatcherIT_EEN4llvm8ArrayRefIPKNS1_7MatcherIS5_EEEE
fatal error: error in backend: Broken module found, compilation aborted!
```
we're seeing a stage 2 ThinLTO (+PGO) build of clang failing with the above verifier error, any ideas what this could be?

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