Removal of redundant attributes and parse-rules from decision node-specs

[elpoelma]

Overview

This PR removes redundant attributes and parse-rules from the following node-specs:

• besluit
• besluit_title
• description
• motivering
• article_container
• besluit_article
• besluit_article_content

The parse-rules of these nodespecs should be able to parse both the old and the new representations.

connected issues and PRs:

None

How to test/reproduce

• Start the dummy app
• Import the sample DecisionTemplate or copy over a document from GN
• Ensure that all RDFa contained in the decision is correctly parsed and stored.

Challenges/uncertainties

At the moment, there are still issues in the parsing logic of decision-articles, I will tackle these issues in a seperate PR.

Checks PR readiness

• UI: works on smaller screen sizes
• UI: feedback for any loading/error states
• Check if dummy app is correctly updated
• Check cancel/go-back flows
• changelog
• npm lint

[piemonkey]

I can't remember the case that these were added for, but they should be easy to reinstate if we find problems again.