BC-8182 - shd creating schools fix

[hoeppner-dataport]

Description

Make creating of new schools work again for superheros.

• it is possible now to create schools in one step without the workaround superheros were used to
• gradually creating a school (enter name, save, edit, ...) is also possible
• feature-checkboxes can be checked in the first step, too
• feature-checkboxes for Messengers were removed (are outdated)

Links to Tickets or other pull requests

• BC-8182
• fix: make creating of schools work again for superheros schulcloud-server#5403

Changes

Datasecurity

Deployment

New Repos, NPM pakages or vendor scripts

Screenshots of UI changes

Approval for review

• All points were discussed with the ticket creator, support-team or product owner. The code upholds all quality guidelines from the PR-template.

Notice: Please remove the WIP label if the PR is ready to review, otherwise nobody will review it.