Add multilang=False to website_image controller to prevent redirects
Because website_image is decorated with website=True
Requests made for the product image at
`/website/image/product.template/xx_xx/..`
triggered redirections to add the language code to the
requests URLs. This redirection was useless, as setting
the language code for images is non-sense.
Adding `websitelang=False` prevents this redirection.
In addition, the redirection could lead to
SSL security concerns, as the redirection
could use the http:// scheme.
Closes#8515