sig#809 - Implement permission for Onboarding Service Provider endpoints

[MaximilianHauer]

Description

The following endpoints are only reachable via the "Onboarding Service Provider Management" Page.
Therefor the permission needs to be adjusted accordingly

Adjust the following endpoint to verify against the permission configure_partner_registration

POST: api/administration/registration/network/partnerRegistration
GET: api/administration/registration/network/companies

move api/administration/registration/network/companies to network controller

api/administration/registration/network/companies -> should be moved to the network controller

Acceptance Criteria

• Ensure that the endpoints POST: api/administration/registration/network/partnerRegistration and GET: api/administration/registration/network/companies are only accessible to users who have the configure_partner_registration permission.
• Unauthorized access attempts should return an appropriate HTTP status code indicating lack of permission (e.g., 403 Forbidden).
• Move the GET: api/administration/registration/network/companies endpoint from its current controller to the network controller.

Test cases

Authorized Access - POST Endpoint

Objective: Verify that a user with configure_partner_registration permission can access the POST: api/administration/registration/network/partnerRegistration endpoint.
Steps:
Authenticate as a user with configure_partner_registration permission.
Send a POST request to api/administration/registration/network/partnerRegistration.
Expected Result: The request is successful, and the server responds with a 200 OK status code.

Unauthorized Access - POST Endpoint

Objective: Ensure that a user without configure_partner_registration permission receives a 403 Forbidden status when attempting to access the POST: api/administration/registration/network/partnerRegistration endpoint.
Steps:
Authenticate as a user without configure_partner_registration permission.
Send a POST request to api/administration/registration/network/partnerRegistration.
Expected Result: The server responds with a 403 Forbidden status code.

Authorized Access - GET Endpoint

Objective: Confirm that a user with configure_partner_registration permission can access the GET: api/administration/registration/network/companies endpoint.
Steps:
Authenticate as a user with configure_partner_registration permission.
Send a GET request to api/administration/registration/network/companies.
Expected Result: The request is successful, and the server responds with a 200 OK status code.

Unauthorized Access - GET Endpoint

Objective: Verify that a user without configure_partner_registration permission receives a 403 Forbidden status when attempting to access the GET: api/administration/registration/network/companies endpoint.
Steps:
Authenticate as a user without configure_partner_registration permission.
Send a GET request to api/administration/registration/network/companies.
Expected Result: The server responds with a 403 Forbidden status code.