[EuiSuperDatePicker] Add functionality to extend EuiButton props

[formgeist]

Summary

As described in elastic/kibana#100881 the implementation of the EuiSuperDatePicker in Kibana will need to update the fill prop in order to remove it so we can use the style in another area of the apps.

Currently, the component does not provide options for extending the EuiButton props which would enable us to change the fill prop value in our implementation.

The result will be that the refresh button can use the default style and we can add the fill style to other primary actions in the UI, like so;

[cchaos]

I think the easiest and scalable solution is to do this is just to have the EuiSuperUpdateButton extend all EuiButton props and then add a updateButtonProps: EuiSuperUpdateButtonProps to the EuiSuperDatePicker component. Of course, we need to be mindful that the consumer cannot override props necessary for the button to behave correctly, so we just need to pay attention to where we spread these props.