Card layouts that don't include a visualization will trigger an unecessary API call

[jaronheard]

Description

If you look at the network tab (especially on civicplatform.org/cards), you will see that API requests are being triggered for all of the cards previewed on the page, despite the previews not showing a visualization.

The API call is triggered in the index.js file for the card.

For this bug to be considered fixed, the following should be completed:

• Find an approach that will prevent CardLayouts that don't include the visualization from triggering an API call
• This approach is applied to all existing cards
• NewCard hygen template updated to use this pattern

Steps to reproduce

Go to one of the following pages with the network tab of developer tools open:
http://civicplatform.org/cards/
http://civicplatform.org/cards/holc-redlining

Observe requests to different endpoints under service.civicpdx.org

Expected result

Should only make API calls for card layouts where visualizations are shown

Actual result

Makes API calls for all card layouts, including previews that only show card text

Environment

Production environment