update jest to v30 (#3815)

e2e:
- needed window.close(), otherwise the objects are not destroyed
- add missing `await` in clock test
- set maxListeners for all tests

remaining todo (comes with another PR if I find the problem):
- calendar e2e is now the only test which still needs `--forceExit`

tests/e2e/helpers/global-setup.js

@@ -33,7 +33,14 @@ exports.startApplication = async (configFilename, exec) => {
 	return global.app.start();
 };
 
-exports.stopApplication = async () => {
+exports.stopApplication = async (waitTime = 1000) => {
+	if (global.window) {
+		// no closing causes jest errors and memory leaks
+		global.window.close();
+		delete global.window;
+		// give above closing some extra time to finish
+		await new Promise((resolve) => setTimeout(resolve, waitTime));
+	}
 	if (!global.app) {
 		return Promise.resolve();
 	}