\includegraphics: totalheight= does not affect depth

[xworld21]

graphicx uses totalheight to set the depth of the image, but LaTeXML treats totalheight as an alias for height. Instead, it should set @imagedepth.

Offending code: https://github.com/brucemiller/LaTeXML/blob/70de862ff1997e228e8a0ee33ba61d1800adf189/lib/LaTeXML/Util/Image.pm#L162