test: Update jest configuration (#3951)

* Split shared tests

* Centralize and parallelize jest config

* ci

server/__mocks__/bull.ts

@@ -19,9 +19,7 @@ export default class Queue {
     const job = this.createJob(data);
 
     if (!this.handler) {
-      throw Error(
-        "Mocking version requires handler to be set before first add()"
-      );
+      return;
     }
 
     this.handler(job, this.done);