Pass the requested size to 'wp_get_attachment_image_attributes' filter.

props mattheu.
fixes #29869.
Built from https://develop.svn.wordpress.org/trunk@29836


git-svn-id: http://core.svn.wordpress.org/trunk@29600 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update @param docs for wp_get_attachment_image().

see #29869.
Built from https://develop.svn.wordpress.org/trunk@29837


git-svn-id: http://core.svn.wordpress.org/trunk@29601 1a063a9b-81f0-0310-95a4-ce76da25c4cd