Dependencies are not created using the scan_package pipeline

Using https://files.pythonhosted.org/packages/ce/21/41a0028f6d610987c0839250357c1a00f351790b8a448c2eb323caa719ac/celery-5.2.7.tar.gz as input.

With the `scan_codebase` and `root_filesystems` pipelines, 88 dependencies are created.
When using the `scan_package` pipelines, no dependencies are created.

Note that the "Datafile resource" `requires.txt` and `PKG-INFO` used to create those dependencies exist as codebase resources in the `scan_package` pipeline as well.