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/BetaBanner/__snapshots__/BetaBanner.test.tsx.snap

@@ -0,0 +1,20 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`rendering of the BetaBanner checks if component renders 1`] = `
+<DocumentFragment>
+  <div>
+    <div>
+      <div />
+      <div>
+        <span>
+          This is a Beta site. 
+        </span>
+        <span>
+          It is an early, in-progress version of the tool with limited data 
+    sets that will be continuously updated.
+        </span>
+      </div>
+    </div>
+  </div>
+</DocumentFragment>
+`;