[x] Update static Chart visuals to all have titles. All titles need to be 16px (from current 14px)
[x] Move all legends from top to bottom. Bottom ones align to the Y-axis or Title in case of Donut/Pie chart
[x] Update Radar chart image on Chart types page
[x] Legend page needs to be updates (images and copy). Legends are not default bottom and aligned to vertical axes when present or title in pie, etc. Move all legends to bottom.
[docs] Data Viz section: usage image fixes
https://www.carbondesignsystem.com/data-visualization/legends
https://www.carbondesignsystem.com/data-visualization/basic-charts
https://www.carbondesignsystem.com/data-visualization/basic-charts/#stacked-area-chart https://www.carbondesignsystem.com/data-visualization/basic-charts/#bubble-chart