[bot] Determine more reliably if node has shadow DOM #13053
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Description
node.shadowRoot might have an object assigned (some framework working with ShadyDOM does assign an object to node.shadowRoot), but it is no necessarily used by the browser as it must be constructed by ShadowRoot, otherwise is ignored.
Motivation and Context
Mechanisms like bot.dom.isShown() would determine an element is not shown because it believes it does not have parent.
Types of changes
Checklist