Find all dsyms generated.
Find all dsyms generated.

Previous code would miss dsyms in dependencies if it thought that the top-level data did not have a dsym.

This meant that dsyms for xctest bundles were not being recorded.

PiperOrigin-RevId: 325885801

bazelbuild/tulsi,bazelbuild/tulsi,bazelbuild/tulsi,bazelbuild/tulsi,bazelbuild/tulsi,bazelbuild/tulsi