Engines + visit test issue

[asakusuma]

I noticed that #14055 if failing only on the prod and jquery suite. I dug further and it would appear that engines + visit + shouldRender: true causes some issues with the run loop in the tests, but only in prod and jquery extended prototype suites.

Should not be in a run loop at end of test
Ember run should not have scheduled timers at end of test
Assertion Failed: You have turned on testing mode, which disabled the run-loop's autorun. You will need to wrap any code with asynchronous side-effects in a run

Here is a failing PR to repro: #14085

cc @dgeb @krisselden @trentmwillis

[rwjblue]

@asakusuma - FWIW, the eachPackageTests were completely broken and running no tests until #14084.

[asakusuma]

Thanks @rwjblue. This issue was happening both before and after that PR.

I've confirmed locally that this issue happens when enableoptionalfeatures is both on and off, which would suggest that the issue is independent of glimmer.

[rwjblue]

I believe this is fixed (I closed the related failing test PR #14085).