Fix supportedDestinations presets being injected when settingPresets is none (#1599)

Gate the supportedDestinations YAML preset block inside the applyTarget check so that settingPresets: none (and project) suppresses Catalyst-related settings (SUPPORTS_MACCATALYST, SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD, SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD) that were previously always injected.

Fixes #1598