Add `pin_labels` attribute for `image_diff` comparison method #26098

Job	Run time
build-client / build-client	10m 56s
setup-selenium / setup_chromedriver	6s
Test (3.8, 0)	43m 55s
Test (3.8, 1)	55m 6s
Test (3.8, 2)	50m 10s
	2h 40m 13s

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