Fix Xcode cache miss for Swift macro artifacts renamed after their product

Tuist’s Xcode cache now correctly restores Swift macro artifacts whose artifact name differs from the target name (for example, a DependenciesMacrosPlugin target that produces a DependenciesMacros.macro artifact). Previously those renamed artifacts were treated as cache misses even when present in storage, so affected macro targets fell back to building from sources unnecessarily. If a macro artifact is genuinely absent, Tuist now follows the normal cache miss path instead of producing a generated project that references an unusable artifact.