Feature/add multiple FoS at once

[tobias-wiese]

Description

Implements issue #464 (delete if no issue)

Reason for this PR

• see adapt API to accept a list of FoS for updating the matriculation data  #464 and epic #264

Changes in this PR

• change required arguments for updateMatriculation a list of SubjectMatriculatio and apapt the API calls

Type of change (remove all that don't apply)

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Could not be tested yet as MatriculationManagement is not available

Checklist: (remove all that don't apply)

• I added corresponding unit tests (if API code)
• I have performed a self-review of my own code
• My changes generate no new linting warnings or console warnings
• I have updated the CHANGELOG.md to include any changes made in this PR (add WIP to the top, if there is none already)

Notes:

• e2e tests will be implemented with issue Catch up e2e tests for the matriculation management #447