(RSP-1525) Fixing arrow key navigation for RTL ButtonGroups (#223)
* Fixing buttonGroup keyboard nav when RTL
Pressing left/right arrow will always move focus to the button left/right of the current button
* adding tests and moving rtl logic to buttonGroupCollection
* fixing lint
* Moving rtl logic to useButtonGroupKeyBoardDelegate
* memoizing the delegate as per review suggestion
* Updating tests for readability
* derp fixing hard coded locale
Co-authored-by: Robert Snow <snowystinger@gmail.com>