[Visualization designer] Default to data table type and remove the data preview
Problem to solve
The data preview option uses the DataTable
visualization to render while we also provide the option to preview the DataTable
visualization.
This issue is part of the larger initiative to simplify the designer UI in Improve layout of the filtered search visualiza... (#463790).
Proposal
We can remove this redundancy and simplify the UI by removing the "Data" option and defaulting the selected type to "Data table".