[llvm] [mlir] [MLIR] Add llvm (debug) attributes to CAPI (PR #83992)

[Oleksandr Alex Zinenko via llvm-commits]

https://github.com/ftynse requested changes to this pull request.

We shouldn't have random reformatting in unrelated parts of the project. Please undo any change made to `include/llvm-c`.

Also, I did not mean that MLIR C API should include LLVM C API, but provide C enums for the corresponding C++ enums in MLIR C++ API. Similarly to how we do for `MlirDiagnosticSeverity` or `MlirSparseTensorLevelFormat`. 

https://github.com/llvm/llvm-project/pull/83992