1492 remove criteria group

[gchi25]

PR Summary

This work removes criteria group.

• removes criteria group in children field of paragraph criteria
• removes criteria group in criteria field of paragraph section
• removes Add criteria group button in life event form

Related Github Issue

• Fixes Remove Criteria Group #1492

Detailed Testing steps

To test in local development site or in dev site.

• Pull changes locally
• Make local development site up at http://localhost
• If in local, bin/drush cim --partial --source=modules/custom/usagov_benefit_finder/configuration -y
• Navigate to admin/content?combine=&type=bears_life_event_form&status=All&langcode=All
• Go to life event form "Benefit finder: death of a loved one" edit page
• Go to criteria "Applicant date of birth"
• Verify no Add criteria group button in criteria

• Go to "Deceased service status"
• Verify no Add criteria group button in children of criteria