Add HardTanh to RemovePermutesAroundElementwiseOps (#6992) #5157

Job	Run time
set-version	4s
build-benchmark-app / macos-job	17m 30s
build-demo-ios / macos-job	11m 51s
build-frameworks-ios / macos-job	20m 37s
upload-demo-ios	18s
test-demo-ios / mobile-job (ios)	21m 37s
upload-frameworks-ios	32s
	1h 12m 29s

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