Add more CI testcases for Exynos Backend #1606

Job	Run time
test-coreml / test-backend-macos (coreml, operators) / macos-job	16m 51s
test-coreml / test-backend-macos (coreml, models) / macos-job	20m 31s
test-coreml / test-backend-linux	0s
test-coreml / package-golden-artifacts	0s
	37m 22s

Provide feedback