Add radius utilities and deprecated rounded utilities

Author: adamwathan

Diff for: packages/@tailwindcss-postcss/src/__snapshots__/index.test.ts.snap

@@ -271,14 +271,6 @@ exports[`\`@import 'tailwindcss'\` is replaced with the generated CSS 1`] = `
     --blur-xl: 24px;
     --blur-2xl: 40px;
     --blur-3xl: 64px;
-    --radius-xs: .125rem;
-    --radius-sm: .25rem;
-    --radius-md: .375rem;
-    --radius-lg: .5rem;
-    --radius-xl: .75rem;
-    --radius-2xl: 1rem;
-    --radius-3xl: 1.5rem;
-    --radius-4xl: 2rem;
     --shadow-2xs: 0 1px #0000000d;
     --shadow-xs: 0 1px 2px 0 #0000000d;
     --shadow-sm: 0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;

Diff for: packages/tailwindcss/src/__snapshots__/index.test.ts.snap

@@ -270,14 +270,6 @@ exports[`compiling CSS > \`@tailwind utilities\` is replaced by utilities using
   --blur-xl: 24px;
   --blur-2xl: 40px;
   --blur-3xl: 64px;
-  --radius-xs: .125rem;
-  --radius-sm: .25rem;
-  --radius-md: .375rem;
-  --radius-lg: .5rem;
-  --radius-xl: .75rem;
-  --radius-2xl: 1rem;
-  --radius-3xl: 1.5rem;
-  --radius-4xl: 2rem;
   --shadow-2xs: 0 1px #0000000d;
   --shadow-xs: 0 1px 2px 0 #0000000d;
   --shadow-sm: 0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;