[llvm] [Symbolizer, DebugInfo] Clean up LLVMSymbolizer API: const string& -> StringRef (PR #104541)

[James Henderson via llvm-commits]

jh7370 wrote:

> @jh7370 I've answered your comments, could you please have a look?

The usual acceptable ping time is a week, not a few hours... I have several other reviews and discussion threads to interact with, and I can only afford a limited time, so I can't always immediately respond.

https://github.com/llvm/llvm-project/pull/104541