Adding dSYMs (DWARF debug symbols) to the xcFramework.
Needed to generate debug symbols for both release and debug builds and explicitly set the format so all arches actually generate the dSYMs.
This allows distributing an SDL3 app to the AppStore without the need to generate the dSYMs via script when using either the xcFramework or embedding the SDL3 Xcode project.
Fixes #13573

(cherry picked from commit 98c03c644a54447b21a79659c6abf88a83cd9ef2)