Add beta site banner (#802)

* Add new BetaBanner and remove legacy Alerts

- add BetaBanner component and test
- update AboutCard test
- remove AlertWrapper component, copy and tests
- remove AlertWrapper from all pages
- add BetaBanner copy and intl
- update logo and color
- add styles using USWDS tokens to globals.scss

* Add Beta pill to header

- refactor Header to use Grid and USWDS
- refactor global.scss to use Grid and USWDS
- updates snapshots

* Move styles from global to modules

- move BetaBanner styles from global to modules
- move J40Header to a folder component and module styles
- add J40Header unit test
- add a design-system.scss file that allows USWDS styles in modules
- updates snapshots

* Update en.json file

* Trigger Build

* Add initial Spanish content

- add README for translation team
- add createSpanishJson script
- add initial version of es.json
- add a spanish string variable to test translation

* Add retry and timeout config to stalled test

* Remove redundant test cases for AboutCard

- update snapshot

* Update BetaBanner description

client/src/components/DatasetContainer/index.tsx

@@ -2,7 +2,6 @@ import React from 'react';
 import {useIntl} from 'gatsby-plugin-intl';
 import {Grid} from '@trussworks/react-uswds';
 
-import AlertWrapper from '../AlertWrapper';
 import DatasetCard from '../DatasetCard';
 import J40MainGridContainer from '../J40MainGridContainer';
 import {hyphenizeString} from '../../../cypress/integration/common/helpers';
@@ -22,7 +21,6 @@ const DatasetContainer = () => {
 
           <Grid row>
             <Grid col={12}>
-              <AlertWrapper showBetaAlert={false} showLimitedDataAlert={true}/>
               <h2>{intl.formatMessage(METHODOLOGY_COPY.DATASETS.HEADING)}</h2>
             </Grid>
           </Grid>