Restored SwiftPM binary artifacts now use SwiftPM’s expected scratch path

SwifterPM was updated to use SwiftPM’s canonical artifact scratch path (.build/artifacts/…) for restored binary artifacts, instead of a separate .build/swifterpm/artifacts/… layout. This fixes the “Build input file cannot be found” error when building generated projects after restoring binary dependencies, because the restored binary paths now match the locations Xcode expects.