Run ember-cli-update to v3.28.3 and enable Ember v4 scenarios

[SergeAstapov]

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[SergeAstapov]

@snewcomer there is one test case observing #rollback values that fails once I pull all the latest updates.

Not sure I understand how addObserver works on the Changeset instance, so will try to find the root cause.

[SergeAstapov]

Figured out the root cause of previous failure:
as this PR set "default-async-observers": true, fixed the test to use await settled() to ensure proper timing of assertions

Now have another issue with Embroider + Ember Data compatibility:

Error: Could not find module `@ember-data/model/-private` imported from `(require)`

Did update all the dependencies and refreshed package-lock.json in this PR as well, so will keep digging.

[SergeAstapov]

Hooray! This is now pass!
Had to use "@embroider/test-setup": "^0.42.3" as there are compatibility issues with latest versions of Ember Data + Embroider.

Checked all the versions of @embroider/test-setup past 0.43.0 and apparently all emit an error

Error: Could not find module `@ember-data/model/-private` imported from `(require)`

As this addon does not depend on Ember Data, I think this is not an issue for this PR.

[snewcomer]

💪

[snewcomer]

Great point on the e-d issues. There is some custom hacks but I know we have some medium level effort to get ember-data in compat with embroider.