test_ocr_on_static_images: Use pytest parametrized arguments
test_ocr_on_static_images: Use pytest parametrized arguments

This makes it easier to see which variant failed.

stb-tester/stb-tester,LewisHaley/stb-tester,stb-tester/stb-tester,stb-tester/stb-tester,stb-tester/stb-tester,LewisHaley/stb-tester,LewisHaley/stb-tester,LewisHaley/stb-tester,LewisHaley/stb-tester,LewisHaley/stb-tester,LewisHaley/stb-tester