[IncrementalScan][Caching] Validate Swift Binary Module Deps
For swift binary module deps, it's cache key and output are setup during
dependency scanning time. When loading the module dependency from the
incremental cache, need to validate the CAS key and output for swift
binary module both exist in the CAS, otherwise, it needs to be
invalidated so a rescan will re-ingest the binary modules into the CAS.
rdar://173647646
