RangeControl: add size prop

[jameskoster]

Currently the slider in RangeControl renders at 30px height, and there's no way to adjust that outside of manual overrides. In cases where a text field is included this isn't a problem – the container grows to accommodate the text field height. But when there's no text field it means RangeControl will not align with the standard 40px, 32px, 24px sizing convention.

Ideally this is updated so that consumers can specify a size, like many other components, as outlined in #46734

[t-hamano]

By adding the __next40pxDefaultSize prop, it seems to change to 40px size.

https://wordpress.github.io/gutenberg/?path=/story/components-rangecontrol--default&args=__next40pxDefaultSize:!true;withInputField:!false

Does this mean we also need 24px or 32px variations?

[jameskoster]

Oh neat, I didn't notice that documented in Storybook.

Does this mean we also need 24px or 32px variations?

Yes, I think it still makes sense to offer the same size options as other inputs / buttons.