Change the title inside svg to be what is filled in the alt text field.

Re-rolling the patch for current branch 3.x.

Hi everybody,

This missing feature seems important.
Shouldn't this patch also generate the role="img" attribute, to be compliant ?
@see also https://www.drupal.org/project/svg_image/issues/3366836 💬 Add acessibility properties to SVG Active

Hiding patches to focus on the MR.