API: copy np.ndarray inputs to Index subclass constructors by default

[mroeschke]

As a follow up to #63370, Index subclasses should have their copy argument changed to copy: bool | None = None to copy np.ndarray and ExtensionArray inputs if copy=None is passed to mirror the Series constructor behavior. DatetimeIndex, TimedeltaIndex, PeriodIndex and IntervalIndex are the relevant subclasses to change.