Fix setting data on the editor component when the component is initializing

[ma2ciek]

Suggested merge commit message (convention)

Fix: Fixed setting data on the editor component when the component is initializing. Closes ckeditor/ckeditor5#9620.

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[ma2ciek]

TBH I'm not sure about the original test. I don't see anything wrong with using editor.setData() on a data property change from outside of the editor component. This can't work with RTE anyway.

[pomek]

Could I ask about checking the current version of the code with the following versions (for all packages)?

• 27.0.0
• 27.1.0

We already know that it works with 28.0.0.

[pomek]

Also, it would be good to downgrade Angular to the previous version and verify whether it still works. It will prevent us from bumping minor/patch if we will introduce a BC.

[ma2ciek]

Could I ask about checking the current version of the code with the following versions (for all packages)?

• 27.0.0
• 27.1.0

We already know that it works with 28.0.0.

Done ✅

Also, it would be good to downgrade Angular to the previous version and verify whether it still works. It will prevent us from bumping minor/patch if we will introduce a BC.

I haven't tested it but it should not have an effect. However, it would be nice if we could someday create e2e and unit tests against multiple Angular versions.