fix(ngScenario): Allow ngScenario to handle lazy-loaded and manually bootstrapped applications

I know protractor is preferred, and ngScenario is only in maintenance mode. But, we are limited to
ngScenario based on the devices/browsers we are targeting (no web-driver available). So, we need
to address the bug where ngScenario does not work with manual bootstrap and also has issues if
angular.resumeBootstrap is not yet defined (race condition when lazy-loading).

Closes #10723