refactor: simplify jest config (#42136)

* refactor: bring api jest tests to root

* refactor: pull client tests to root

* fix: remove ancient curriculum babelrc

* feat: run all jest tests at once

* fix: remove unused babelrcRoot

* chore: remove more jests

client/i18n/locales.test.js

@@ -31,7 +31,7 @@ const filesThatShouldExist = [
   }
 ];
 
-const path = `${process.cwd()}/i18n/locales`;
+const path = `${__dirname}/locales`;
 
 describe('Locale tests:', () => {
   availableLangs.client.forEach(lang => {