QDoc generates warnings for images that do not have alt-text associated
with them. Alt-text is used to add context to images for users who use
screen-readers.
This patch applies alt-text to images in the Qt SQL module that do not
have any alt-text associated with them.
Fixes: QTBUG-135114
Pick-to: 6.9 6.8
Change-Id: Iead375852d30219db7dfed12bb1f383eb55713e6
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
7b66c906bf