Cached frameworks no longer embed external SPM resource bundles

Tuist’s cache graph mutator now keeps external bundle targets as source dependencies when they reach a source target that cannot embed external resource bundles (such as an internal framework). Previously, transitive SwiftPM resource bundles were copied into every internal framework’s Copy Bundle Resources phase, ballooning the framework, the app, and the install size. App-like targets still receive the bundle dependency for runtime resource lookup.