Allow pass a custom third-party interactor to `setDay` action for Calendar

There is a case with custom day render there days from prev and next months could be visible. In that situation setDay with number of the day throws an error because calendar container contains two same days.

test.step(
  renderCalendar((onChange) => ({
    renderDay: (day, _selectedDate, dayInCurrentMonth, dayComponent) =>
      cloneElement(dayComponent, {
        hidden: false,
        ...(dayInCurrentMonth
          ? undefined
          : { style: { opacity: "0.5" }, onClick: () => onChange?.(day as Date) }),
      }),
  }))
)
.step(Calendar().setDay(4))
.assertion(Calendar("4 September 2014").exists())

Start with the Calendar().setDay(4) action and the renderCalendar reproduction in the issue, focusing on how duplicate days from adjacent months are selected. Confirm the failing assertion, then make the action support the custom day interactor so the September 4 date is selected without the duplicate-day error.