Non-GET requests always get the request data added to the body

[maximiliansoelch]

For all non-get request we currently add the request data to the body automatically:

artemis-ios-core-modules/Sources/APIClient/APIClient.swift

Lines 93 to 101 in 56dc7c0

	// NOTE: GET requests with body are never sent
	// thus, add body only for non-GET requests
	if request.method != .get {
	urlRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
	urlRequest.httpBody = body(for: request)
	}
	printRequest(urlRequest: urlRequest)

This can lead to issues, e.g. when a POST Endpoint called via APIClient does not expect a body (only as optional): ls1intum/Artemis#7610