Standardized competency endpoints do not follow admin convention

[N0W0RK]

Is your feature request related to a problem?

Usually all admin endpoints are located at api/admin/ as documented here:

Artemis/src/main/java/de/tum/cit/aet/artemis/core/security/annotations/EnforceAdmin.java

Line 12 in 3779e88

* It should only be used with endpoints starting with {@code /api/admin/}

This conflicts with the endpoint for standardized competencies at api/stanardized-competencies/:

Artemis/src/main/java/de/tum/cit/aet/artemis/atlas/web/StandardizedCompetencyResource.java

Line 33 in 3779e88

@RequestMapping("api/standardized-competencies/")

Describe the solution you'd like

Move endpoint to api/admin/standardized-competencies/

Describe alternatives you've considered

No response

Additional context

No response

[MaximilianAnzinger]

Actually they are.