fix(RadioGroup): use regular components instead of Label

[layershifter]

Fixes #1040.

---

BREAKING CHANGES

1. Generated markup was changed:

Before

    <div
      role="radio"
      tabindex="-1"
      aria-checked="false"
      aria-disabled="true"
      class="ui-radiogroup__item dd aj"
    >
      <span class="ui-label bt ht et gy hz ii cw ib ic id bf bm hu">
        <span class="ui-icon ek aj bu ak ai ie if ig ce hv ij ik hy" aria-hidden="true"></span>
        <span dir="auto">Prosciutto</span>
      </span>
    </div>

After

    <div
      role="radio"
      tabindex="-1"
      aria-checked="false"
      aria-disabled="true"
      class="ui-radiogroup__item jo bf bt bm jp dd jq ie"
    >
      <span class="ui-icon ek aj bu ak ai ju jv jw ce jr il jy jt" aria-hidden="true"></span>
      <span dir="auto" class="ui-box">Prosciutto</span>
    </div>

2. label is now shorthand value, see Shorthand Props

[codecov]

Codecov Report

Merging #1070 into master will decrease coverage by <.01%.
The diff coverage is 86.66%.

@@            Coverage Diff             @@
##           master    #1070      +/-   ##
==========================================
- Coverage    81.9%   81.89%   -0.01%     
==========================================
  Files         693      693              
  Lines        8448     8447       -1     
  Branches     1233     1163      -70     
==========================================
- Hits         6919     6918       -1     
  Misses       1514     1514              
  Partials       15       15

Impacted Files	Coverage Δ
...eams/components/RadioGroup/radioGroupItemStyles.ts	20% <0%> (+1.81%)	⬆️
...s/components/RadioGroup/radioGroupItemVariables.ts	100% <100%> (ø)	⬆️
...react/src/components/RadioGroup/RadioGroupItem.tsx	100% <100%> (ø)	⬆️
packages/react/src/components/Label/Label.tsx	97.05% <0%> (-2.95%)	⬇️

---

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[mnajdova]

Should we change the type of the label prop to ShorthandValue?

[mnajdova]

Please add section above this (Breaking change probably if we introduce changes of the typings)

[kolaps33]

Tested with readers. And it looks good :) 👍

[mnajdova]

The code looks good. Be sure to fix the screener regressions before merging.