InputControl: Add flag for larger default size

[mirka]

Part of #39397

What?

Adds the temporary prop __next36pxDefaultSize to opt into the new 36px height default size.

Dependent components

This also technically adds __next36pxDefaultSize support to any higher-level component that forwards props onto InputControl.

• For NumberControl, I checked locally that it looks as expected. I don't think it's worth adding the prop to Storybook at the moment — I'd prefer waiting until the TS conversion + Knobs-to-Controls rewrite.
• For UnitControl, I'll do a separate PR to adjust paddings and add "official" support for it via TypeScript. (Which will also add it to Storybook) UnitControl: Add flag for larger default size #40627

Why?

As part of the effort to move toward consistent component sizes.

How?

Details of the migration plan are written in the original issue #39397.

Testing Instructions

1. npm run storybook:dev
2. Go to the story for InputControl. By setting the __next36pxDefaultSize control to true, the height of the default size variant should increase to 36px. All other size variants are unchanged.

Screenshots or screencast

Old default

New default (opt-in for now)

[ciampo]

LGTM 🚀

Would we need need to expose this prop in RangeControl too, similarly to what #40627 does for UnitControl?

Also cc'ing @aaronrobertshaw since this should also affect RangeControl (alco cc'ing @aaroncampbell in case there's any changes to make in #40535 once this gets merged)

[mirka]

Would we need need to expose this prop in RangeControl too, similarly to what #40627 does for UnitControl?

Yep! That and a few more higher-level components listed in "Stage 2" here.