When `stopAtErrors` is set, throw rather than warn when exceeding `maxImageSize` (issue 14626)
When `stopAtErrors` is set, throw rather than warn when exceeding `maxImageSize` (issue 14626)

The situation described in issue 14626 seems like a fairly special case, and it thus seem reasonable that we simply follow the same pattern as elsewhere in the `PartialEvaluator` when the `stopAtErrors` API-option is being used.

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