feat(ui5-carousel): add accessibleName and accessibleNameRef

[ilhan007]

Adds accessibleName and accessibleNameRef public properties to allow consumers set accessible label on the Carousel.

    <ui5-title id="imgGallery" level="H4">Image Gallery</ui5-title>
    <ui5-carousel accessible-name-ref="imgGallery">
        <img src="../assets/images/sample1.jpg" alt="Landscape 1">
        <img src="../assets/images/sample2.jpg" alt="Landscape 2">
        <img src="../assets/images/sample3.jpg" alt="Bulb">
    </ui5-carousel>
    
      <ui5-carousel accessible-name="Image Gallery">
        <img src="../assets/images/sample1.jpg" alt="Landscape 1">
        <img src="../assets/images/sample2.jpg" alt="Landscape 2">
        <img src="../assets/images/sample3.jpg" alt="Bulb">
    </ui5-carousel>

Fixes: #8472