fix: Ensure chat suggestion buttons have correct block padding

Chad Lavimoniererequested to merge
20250716-clavimoniere-duo-chat-suggestion-button-block-padding into main

What does this MR do?

Sometimes the text in chat suggestion buttons wraps to a second line, and currently in production these buttons do not have any top and bottom padding (note that they do have padding in the duo-ui storybook, but that is not an accurate reflection of prod usage). This MR adds explicit block padding to these buttons so that proper spacing is maintained when text wraps.

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Screenshot_2025-07-16_at_11.01.13 Screenshot_2025-07-16_at_11.00.51

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