Update Rancher Prime registration UI

[cnotv]

Summary

Fixes #14151

To test the UI either disable the check or run a Rancher Prime instance.

  if (!plugin.environment.isPrime) {
    return false;
  }

Occurred changes and/or fixed issues

Updated content as in issue definition.
Validation stays the same.

Technical notes summary

• Fixed BadgeState story to render correctly

Areas or cases that should be tested

Areas which could experience regressions

Screenshot/Video

Kapture.2025-05-13.at.19.15.46.mp4

Checklist

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• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes