BundleConfigImportValidate error message when entities exist of a bundle being deleted could be clearer

Hello @joachim

I tried to update the message, instead of removing, I think its better to add the changes and make it look like
"The config import is trying to delete the bundle %bundle. Entities exist of type %entity_type and %bundle_label %bundle. These entities need to be deleted before importing."

Please review and suggest if any other changes are required, moving the issue to Needs Review

So this actually seems pretty clear as is to me at least. We know that a config import can be doing deletions, not needs to mention that, sure there a dozen places that could be the case then. But will leave in review for others.

So wonder if this should be closed as works as designed.

I don't know what I can respond to #6. I think it could be clearer. I don't see what's the downside of clarifying the error text.