[lldb] [llvm] Add a createError variant without error code (NFC) (PR #93209)

[Adrian Prantl via llvm-commits]

adrian-prantl wrote:

Thanks for providing the context, Lang!
Inside of LLDB we use llvm::Expected often in completely closed environments where the expectation is always that all errors are handled internally and we never would exit the process with an error code, so this would be useful here.

https://github.com/llvm/llvm-project/pull/93209