refactor(VRadioGroup): tuning pass (#15259)

* refactor(VRadioGroup): tuning pass

* fix(VRadioGroup): remove @forward from sass file

packages/vuetify/src/components/VRadioGroup/VRadioGroup.sass

@@ -1,9 +1,11 @@
+@use './variables' as *
+
 .v-radio-group
   grid-template-areas: "prepend label append" ". control ." "a messages b"
 
   > .v-label
-    grid-area: label
-    margin-inline-start: 12px
+    grid-area: $radio-group-label-grid-area
+    margin-inline-start: $radio-group-label-margin-inline-start
 
     + .v-selection-control-group
-      margin-top: 16px
+      margin-top: $radio-group-label-selection-group-margin-top

packages/vuetify/src/components/VRadioGroup/VRadioGroup.tsx

@@ -2,10 +2,10 @@
 import './VRadioGroup.sass'
 
 // Components
+import { filterControlProps, makeSelectionControlProps } from '@/components/VSelectionControl/VSelectionControl'
 import { filterInputProps, makeVInputProps, VInput } from '@/components/VInput/VInput'
 import { VLabel } from '@/components/VLabel'
 import { VSelectionControlGroup } from '@/components/VSelectionControlGroup'
-import { filterControlProps, makeSelectionControlProps } from '@/components/VSelectionControl/VSelectionControl'
 
 // Composables
 import { IconValue } from '@/composables/icons'

packages/vuetify/src/components/VRadioGroup/__tests__/VRadioGroup.spec.cy.tsx

@@ -0,0 +1,14 @@
+/// <reference types="../../../../types/cypress" />
+
+import { VRadioGroup } from '..'
+import { generate } from '@/../cypress/templates'
+
+const props = {}
+
+const stories = {
+  Default: <VRadioGroup />,
+}
+// Tests
+describe('VRadioGroup', () => {
+  generate({ stories, props, component: VRadioGroup })
+})