hack up get_images_from_skps

I couldn't get the version at head to give me any images,
so I decided to rewrite it.  Does something like this work
for you?

BUG=skia:5010,skia:5005

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1737593003

Review URL: https://codereview.chromium.org/1737593003
2 files changed