Tests refactoring: slide toggle element

[alla-blinkova]

Should be done AFTER #4933 is completed.
Tests should be added to cover features:

1. Check JDI-Light framework part, if control implemented correctly,

• Ensure that all the required methods and variables are implemented in the control for it to function correctly in tests.
• Check if all the remaining functionality is working properly.

2. Tests should be added to cover features:

• labelPosition: 'before' | 'after'

3. Verify the correct design and functioning of all existing tests.

• Perform this check after the implementation is completed.