[#8530] Support button redesign

[vellip]

Describe your changes Updated support button code, includes new a4 rating component with its custom rendering. Depends on https://github.com/liqd/adhocracy4/pull/1694

Tasks

• [x] PR name contains story or task reference
• [ ] Steps to recreate and test the changes
• [ ] Documentation (docs and inline)
• [ ] Tests (including n+1 and django_assert_num_queries where applicable)
• [x] Changelog

[hom3mad3]

.ttf might not be needed anymore?