district: Person snippet refactor

district/models.py

district/templates/district/base.html

district/templates/district/blocks/people_group_block.html

district/templates/district/district_article_page.html

district/templates/district/district_contact_page.html

district/templates/district/district_person_page.html

region/templates/region/base.html

region/templates/region/region_contact_page.html

region/templates/region/region_people_page.html

region/templates/region/region_person_page.html

shared/templates/shared/person_badge_snippet.html