Support downloading macOS dSYM files automatically

[CouleeApps]

What is the feature you'd like to have? Similar to how PDB and Debuginfod support can both load symbols automatically, it would be super cool to have the equivalent for macOS. It's documented here: https://opensource.apple.com/source/lldb/lldb-179.1/www/symbols.html (you know you're making a good decision when it involves the lldb documentation)

Is your feature request related to a problem? I want my symbols to be downloaded automatically, if possible.

Are any alternative solutions acceptable? Not really

Additional Information: The macOS version of this is rather spicy because it uses both NSUserDefaults keys (no cross platform support) and optional shell scripts to run when searching for files (feels like a security nightmare). We may need some safety rails on whatever implementation we wind up with.