fix: button tooltip should not show on showing image preview (#8224)

when showing image preview in modal, the following code
660060a765/packages/react/focus-scope/src/FocusScope.tsx (L143) will find the first tabbable element and focus, which will trigger the button's tooltip

Adding tabIndex to the image to fix this issue

packages/frontend/core/src/modules/peek-view/view/image-preview/index.tsx

@@ -308,6 +308,7 @@ const ImagePreviewModalImpl = ({
               data-testid="image-content"
               src={url}
               alt={caption}
+              tabIndex={0}
               ref={imageRef}
               draggable={isZoomedBigger}
               onMouseDown={handleDragStart}