chore(ci): rebalance karma tests

[nolanlawson]

Details

Rebalances the Karma tests from 3 groups into 4, and splits the groups so that each has 6-7 individual tests.

Does this pull request introduce a breaking change?

• 😮‍💨 No, it does not introduce a breaking change.

Does this pull request introduce an observable change?

• 🤞 No, it does not introduce an observable change.

[nolanlawson]

Pretty balanced, I'd say