fix: correctly calculate accessibleNameRef

[dimovpetar]

Affects all components that use AriaLabelHelper.

Problem
AriaLabelHelper uses findNodeOwner, which cannot find elements in the same document, when the element (radio button) is wrapped in another component. Example:

<ui5-label id="label" text="Label"></ui5-label>
<ui5-list>
  <ui5-li-custom>
     <ui5-radio-button id="rb" accessible-name-ref="label"></ui5-radio-button>
   </ui5-li-custom>
</ui5-list>

const owner = findNodeOwner(document.getElementById("rb")); // <ui5-li-custom>
owner.querySelector("#label"); // []
getAriaLabelledByTexts(document.getElementById("rb")); // ""

Solution
Replace findNodeOwner with Node.getRootNode()

Fixes #5452

[ilhan007]

Looks good - the native method to replace our custom logic. I think back then the IE support was an issue.