add gm to exercise rotated imagefiltesr w/ and w/o antialiasing

BUG=skia:3288
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1902253003

Review URL: https://codereview.chromium.org/1902253003
1 file changed