Allocation Of Emissions form: remove use of form context to break things down

The we should be able to build a schema from the form data / API that contains everything we need to at least display the form.
Calculations could make use of the context, but we shouldn't rely on the context to set form titles

Locate the Allocation Of Emissions form and trace how its schema and titles are built from form context, form data, and the API. Identify which context values are needed only for calculations and verify that the available form data can display the complete form. Done means display titles no longer depend on context while calculations and form behavior still work.

Written by the indexing model from the issue text.