[Feature] Segmented Control - Fix deprecated attributes

[TimRoe]

Ticket 6857

Updated to appease react-native-web package for Web Storybook:

• accessibilityRole prop to role
• accessibilityLabel prop to aria-label
• TouchableOpacity component to Pressable
  • This also necessitated a bit of custom styling to recreate the TouchableOpacity effect of reducing opacity to 20% on press; this was pulled out to a convenience function with the expectation we will need it again later as many components in the existing app use TouchableOpacity

Draft testing included:

• Validating the deprecation notices no longer appear in Web Storybook running locally
• Validating iOS/Android Storybook instances run as expected
  • Included validating screen reader still reads the labels/role as expected with the new props

Draft testing did not include:

• Creating an alpha build or locally validating that things still work as expect within the VA Flagship Mobile App--based on changes, they should work without issue

As a general note: the new role and aria-label properties were added with React Native 0.71; this change hereby renders the components library non-functional to RN applications below that version. This is considered an acceptable risk as the one and only current app leveraging the components library is on 0.71 and the expectation is that any new consumers will be on a higher version.