Only include runtime-relevant config in package CLI dependency detection

[ines]

Description

Previously, the external package dependency detection in spacy package would include the entire config, including sections not relevant at runtime. So if the [training] or [initialize] block included references to registered functions exposed by third-party packages, these packages would become dependencies of the packaged pipeline. That's unideal, so this PR only includes the runtime-relevant sections nlp and components.

Types of change

fix / enhancement (?)

Checklist

• I confirm that I have the right to submit this contribution under the project's MIT license.
• I ran the tests, and all new and existing tests passed.
• My changes don't require a change to the documentation, or if they do, I've added all required information.