[WC-3077] CheckboxRadio: Enhance properties

[yordan-st]

Pull request type

New feature (non-breaking change which adds functionality)

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Description

• We added an aria-label property
• We moved the Caption property below Entity
• We changed the visibility of the Caption property to only appear if Custom content is set to 'No'
• We moved the Group name property to the General tab

What should be covered while testing?

• Apply aria-label and check if it is applied in the DOM
• Check if the Caption and Group name properties show up correctly as described above