D2S Design QA: Alert

1. The props and variants of developed alert does not match design. Hence some variants are missing. 
2. There is unnecessary padding even with the built component. Please see screenshot.
<img width="1104" alt="image" src="https://github.com/desk-design-system/d2s/assets/137146640/166f8921-0b67-4c4d-897e-12365f3c4076">
