[clang] [llvm] [MC] Remove UseAssemblerInfoForParsing (PR #91082)

[Matt Arsenault via cfe-commits]

arsenm wrote:

> It's still used:
> 
> ```
> /work/kparzysz/git/llvm.org/mlir/lib/Target/LLVM/ROCDL/Target.cpp: In member function ‘std::optional<llvm::SmallVector<char, 0> > mlir::ROCDL::SerializeGPUModuleBase::assembleIsa(llvm::StringRef)’:
> /work/kparzysz/git/llvm.org/mlir/lib/Target/LLVM/ROCDL/Target.cpp:302:15: error:
>  ‘class llvm::MCStreamer’ has no member named ‘setUseAssemblerInfoForParsing’
>   302 |   mcStreamer->setUseAssemblerInfoForParsing(true);
>       |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ```

But why? I don't know what business MLIR could possibly have touching this, for AMDGPU of all things

https://github.com/llvm/llvm-project/pull/91082