GN-4441 Remove template comments from anything requested

[x-m-el]

Overview

Remove template from every editor document that is requested. This is the desired function: template comments are only needed when filling in a document and should be hidden when viewing a preview and signing/publishing a document.

connected issues and PRs:

https://binnenland.atlassian.net/browse/GN-4441
frontend-gelinkt-notuleren PR #545

Setup

1. checkout frontend GN GN-4441: Hide template comments via CSS in all previews frontend-gelinkt-notuleren#545
2. use the dev version of this service in your app-gelinkt-notuleren backend. Do this by changing the preimporter in e.g. docker-compose.override.yml. See https://github.com/lblod/notulen-prepublish-service#development-and-testing
3. run the backend and connect frontend...

How to test/reproduce

Template comments should not be shown anywhere in GN, except when actually editing a document. Check if any places in GN still show them where they shouldn't.
Note: the frontend change will hide them via CSS. The service change removes them. Template comments should not exist anymore on documents that can't be edited anymore.

Challenges/uncertainties

The change was done in the editorDocument class instead of in the places where an editorDocument was created. This to avoid having to remember to add it when adding new functionality. In essence the template comment should never be part of anything in the prepublish service.
Not 100% certain if this is the best place though.

[elpoelma]

Code looks good and clean enough :). Still need to test it in combination with the frontend PR.

[x-m-el]

@elpoelma small re-review requested for the comment you gave :)

[elpoelma]

@elpoelma small re-review requested for the comment you gave :)

I tested the frontend in combination with the latest version of this service and it works as expected, so approved :)