Refactor: Refactor makeResult function and form handling in Trial component

[drikusroor]

This pull request includes several refactorings in the Trial component. The checkBreakRound function has been refactored to use explicit types for parameters. The handling of the form variable has been moved inside the feedback_form check, as it is only utilized from within that if statement. The assignment of form has been simplified, and it is now initialized as an empty array if undefined. Additionally, there is a fix for assertions in tests.

Basically, the scenarios are now as follows (in chronological order):

1. if already submitted, return
2. if no feedback form

• with result id, call onResult
• no result id, call onNext
• early return to prevent step 3.

3. if feedback form is present, initialize form with a default value of an empty array. Check break round and all its logic will be performed on a form with a guranteed array type.

Resolves #1245

[BeritJanssen]

Perhaps we can even lose this variable, as the docstring below actually already explains why a boolean is passed into the onResult function.

[drikusroor]

Can't we change this to:

const shouldBreakRound = breakRoundConditions && checkBreakRound(form.map((formElement) => formElement.value), breakRoundConditions);
            const shouldCallOnNextInOnResult = !shouldBreakRound

            await onResult(
                {
                    decision_time: getAndStoreDecisionTime(),
                    form,
                    config
                },
                false,
                false // We already call `onNext` _after_ `onResult` as we cannot pass the `shouldBreak` param `onResult`'s `onNext` call.
            );

            onNext(shouldBreakRound);