Xcode cache daemon picks up client feature flags

The Xcode compilation cache (CAS) daemon installed by tuist setup cache now receives the same TUIST_FEATURE_FLAG_* environment variables as the CLI itself, instead of an empty feature-flag set. This allows the daemon to resolve the correct cache endpoints, including the private-network endpoints selected by flags such as KURA, so the CAS round-trips do not silently fall back to the public endpoint on runners that can reach a private cache.