dashboard: Add maintainers for each test

[sprt]

Acceptance criteria:

• [x] [@sprt] Create Github groups corresponding to maintainers for each test
  • We actually already have some GH groups, let's start with these:
    • @kata-containers/arch-s390x
    • @kata-containers/intel
    • @kata-containers/arch-ppc64le
    • @kata-containers/cri-o
    • @kata-containers/dragonball
    • @kata-containers/rust
• [ ] Create mapping of groups -> tests in dashboard repo
  • Use regexes to match a test name to a group (check with @sprt on crafting these regexes)
• [ ] Implement showing maintainers for each test:
  • When a test is expanded, we show a link to the maintainers group(s)
  • Keep in mind multiple groups may be associated with a given test (if not already today, in the future)