[ToolbarButton]: a11y nvda screen reader does not announce label correctly

Bug Description

https://sap.github.io/ui5-webcomponents/components/ToolbarButton/
upon pressing Enter on the icon, If accessibleName attribute is provided, nvda announces it twice. first, the value of accessibleName and then default value "Exit Full Screen" which is confusing to the user.

<ToolbarButton
  key="exitFullScreen"
  data-testid="exit-full-screen"
  icon={"exit-full-screen"}
  design={ButtonDesign.Transparent}
  onClick={handleExitFullscreenButtonClick}
  ref={exitFullscreenBtnRef}
  accessibleName="Exit Full Screen"
/>

Also if you tab to the icon it announces: "Exit Full Screen button"
When you press Enter it announces: "Exit Full Screen"

Affected Component

ToolbarButton

Expected Behaviour

When accessibleName attribute has value, nvda should not announce the default value e.g. "Exit Full Screen". Also when user presses Enter on the icon announce 'button' as well after the text.
Correct behavior is already observed in SAP UI5 here:
https://sapui5.hana.ondemand.com/#/entity/sap.f.FlexibleColumnLayout/sample/sap.f.sample.FlexibleColumnLayoutWithTwoColumnStart

Also if accessibleName is not used nvda should announce the default button name on tabbing. It could be the same it shows on pressing Enter

Isolated Example

No response

Steps to Reproduce

...

Log Output, Stack Trace or Screenshots

Priority

Medium

UI5 Web Components Version

2.x

Browser

Chrome

Operating System

No response

Additional Context

No response

Organization

No response

Declaration

• I’m not disclosing any internal or sensitive information.