Remove with-parent-controls from implementation

[aj-stein-nist]

Committer Notes

Remove with-parent-controls from implementation XSLT profile resolver used by oscal-content and current OSCAL release builds and associated tests. Closes #1816.

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[wendellpiez]

If we can confirm that the flag with-parent-controls (as supported in the XSLT before this modification) is no longer permitted in the profile model (metaschema), we can accept this PR on the grounds that it aligns the tool better with the model.

By 'the model' here we mean both the profile metaschema and the processing spec for profile resolution. The feature should be either supported or missing in both places.

If the model permits @with-parent-controls we should not merge this PR as it would disable a feature - but the problem of making demonstration samples remains.

I just checked and the flag is not defined in https://github.com/usnistgov/OSCAL/blob/develop/src/metaschema/oscal_profile_metaschema.xml so this PR should be fine.

[Compton-US]

Performed a rebase to address merge conflicts. Just needs a review.

[wendellpiez]

Thanks, LGTM!