It is not a distinct result returned by `swiftscan_compiler_supported_arguments_query` and `swiftscan_compiler_supported_features_query`, not owned by any other type, so it must be disposed of by the clients.
For the client library (`libSwiftDriver`), this is critical for multiplexing library instances, and for compatibility with different versions of `libSwiftDrvier`.
Resolves rdar://73631930
This library now relires on a static compiler library called `swiftDependencyScan`, which is also common to being used by `swift-frontend` for its dependency scanner invocations.