fix(Radio): Modify examples and aria-label/label

[rebeccaalpert]

I removed the Custom Label Radio example, fixed the remaining examples so only one radio button can be selected at a time, and modified aria-labeling so that it's only present if there is no label.

I also updated the relevant snapshot.

Fixes #1007.

[patternfly-build]

PatternFly-React preview: https://1269-pr-patternfly-react-patternfly.surge.sh

[coveralls]

Pull Request Test Coverage Report for Build 4168

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 80.32%

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Totals
Change from base Build 4156:	0.01%
Covered Lines:	4555
Relevant Lines:	5334

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💛 - Coveralls

[jgiardino]

Thanks for making these updates! I checked the behavior of label vs aria-label (i.e. by changing the label prop to aria-label in the code editor), and the html is updated as expected.

[tlabaj]

LGTM

[christiemolloy]

Thanks for making these changes Rebecca. My only concern is that the uncontrolled radio button is still being controlled by the user. The uncontrolled example in the switch component is not able to be controlled by the user, could you update this?

[tlabaj]

@christiemolloy Similar to the other PR #1270. I think the examples are fine as is and uncontrolled component should not be changed.

[tlabaj]

@christiemolloy @rebeccaalpert I opened an issue against the Switch component so it functions when uncontrolled. Good catch Christie!
#1275