InputControl: Fix Flex usage in wrapper

[mirka]

What problem does this address?

The outermost wrapper for InputControl uses Flex, which has a height: 100% by default. This can cause unintended results when used inside a Grid.

What is your proposed solution?

We would normally use a VStack instead of Flex in a use case like this, which doesn't have the 100% height, but we also need to support the HStack-like use case to support labelPosition prop. So instead I think we could pass in appropriate direction/expanded props to the Flex depending on the labelPosition to achieve the correct styles. This is probably just an oversight in how the Flex was used in InputControl.