Avoid duplicate ops registration in macOS executor_runner #6657

Job	Run time
test-vulkan / test-backend-linux (vulkan, models) / linux-job	22m 54s
test-vulkan / test-backend-linux (vulkan, operators) / linux-job	20m 56s
test-vulkan / test-backend-macos	-8s
test-vulkan / package-golden-artifacts	3m 45s
	47m 27s

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