Add test 1x1 images for formula test fixtures.

images
hachoir-metadata 1.3.3
hachoir-metadata: add 1.3.3 bottle.

Closes #31044.
gd: use test fixture image.
graphicsmagick: use test fixture image.
imagemagick: use test fixture image.
imlib2: use test fixture image.
jpeg-turbo: use test fixture image.
mozjpeg: use test fixture image.
webp: use test fixture image.
swftools: use test fixture image.
tiff2png: use test fixture image.