feat(react): added hideLegend prop to RadioButtonGroup

[TannerS]

Closes #

• I wanted to take a jab at the proposed solution in this issue: [Bug]: Getting Accessibility error(AVT) for Radio button group without legendText. #10401. It is not agreed that this solution is the way to go, but I wanted to throw something together to get an idea that it can work. From there, it can be possible to decide if its a solution or not

Changelog

New

• Added hideLegend prop to hide the RadioButtonGroup legend to fix an a11y issue.

Testing / Reviewing

• Tested in local storybook using IBM a11y tool

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[tw15egan]

Nice work! Able to hide the legend and not get any a11y violations 👍🏻 ✅ 🎉