Background color settings for dashboard and visualization background in embedding SDK

[heypoom]

Implement background color settings for the embedding SDK.

Blockers

Beta Give feedback

1. feat(sdk): Add static dashboards to embedding SDK #41973 needed to implement the "dashboard background settings" and "dashcard background settings"

Theme Options

• ✅ Popover background settings
  • Popovers are used in filters, click action context menu, column header menu, etc.
  • Implemented in Add proper brand colors to drills menu #42663
• Visualization & dashcard background settings
  • Apply background color to dashcard container in embedded dashboards
  • Apply background color to question/visualization container in embedded questions
• Dashboard background settings
  • Default to unset/transparent

Considerations

• We can either use the theme.colors field (e.g. bg-visualization), or we can make this a theme option (e.g. theme.visualization.backgroundColor)

[heypoom]

@albertoperdomo @NevRA FYI, I moved this to Milestone 3 because of a hard dependency on Static Dashboard. Denis already implemented background for popovers in the drills PR, but the other 2 (dashcard background, embedded dashboard background) all requires Static Dashboard.