Remove unresolvable relationships from resource models

[elpoelma]

Overview

The recent update to mu-cl-resources 1.23.0 includes some changes in the handling of undefined resource models.
This PR ensures that relationships pointing to undefined models are removed.
Specifically, the following relationships have been removed:

• zitting
  • aanwezigen-bij-start
  • secretaris
  • voorzitter
• behandeling-van-agendapunt
  • aanwezigen
  • secretaris
  • voorzitter
• stemming
  • aanwezigen
  • onthouders
  • stemmers
  • tegenstanders
  • voorstanders
• besluit
  • realisatie
• versioned-agenda
  • editor-document
  • document-container
• versioned-behandeling
  • editor-document
  • document-container
• versioned-besluiten-lijst
  • editor-document
  • document-container
• versioned-notulen
  • editor-document
  • document-container
• published-resource
  • gebruiker
• signed-resource
  • gebruiker
• artikel
  • realisatie
• bestuurseenheid
  • contactinfo
• bestuursorgaan
  • wordt-samengesteld-door
  • bevat
  • bevat-bestuursfunctie
• bestuursorgaan-classificatie-code
  • standaard-type

connected issues and PRs:

lblod/app-gelinkt-notuleren#178

How to test/reproduce

• run mu project doc and observe that the generation of json:api docs executes without errors

Challenges/uncertainties

It seems that this application contains a lot of redundant resource definitions, copied over from GN, but unused in this application.

Checks PR readiness

• UI: works on smaller screen sizes
• UI: feedback for any loading/error states
• Check cancel/go-back flows
• Check database state correct when deleting/updating (especially regarding relationships)
• changelog
• no new deprecations