fix(radio-button): add position rule to button group wrapper

[emyarod]

Closes #8932

This PR adds a position rule to the radio button fieldset wrapper to avoid the invisible inputs adding overflow to their containers

Testing / Reviewing

Replicate the issue using the sandbox example in the original ticket and modify it according to the changes in the PR to observe the overflow/lack of overflow

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[tw15egan]

LGTM 👍 ✅

[emyarod]

bump @jnm2377 when you have a chance

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