[InstallAPI] Add support for parsing dSYMs (#86852)

InstallAPI does not directly look at object files in the dylib for
verification. To help diagnose violations where a declaration is
undiscovered in headers, parse the dSYM and look up the source location
for symbols. Emitting out the source location with a diagnostic is
enough for some IDE's (e.g. Xcode) to have them map back to editable
source files.