Restore Testimony Callout Section to Homepage

[Mephistic]

Summary

The Homepage used to have a TestimonyCallout section that featured a few of the most recent submitted testimonies. This section was removed in the recent Home Page redesign (#2114), but based on user testing, we want to bring this "What People Are Saying" section back:

Success Criteria

• Add the TestimonyCalloutSection into the new HomePage design
  • It should slot right where it used to be - just below the first section with the statehouse graphic.

Additional Links

• Old Code: https://github.com/codeforboston/maple/blob/6495fdbb614c9de0c04188cc4ddda29bb92556d8/components/TestimonyCallout/TestimonyCalloutSection.tsx
• Homepage Redesign PR where this feature was removed: Visual refresh and expanded ballot question support #2114