support fuse layer norm grad for npu #78664

Job	Run time
Mirror third party dependencies	58s
License and format	1m 3s
Collect information about PR and source	8s
Find build cache	10s
Static analysis with clang on diff	40m 17s
Build OneFlow (cu118)	25m 21s
Build OneFlow (cpu)	17m 30s
Build OneFlow (cpu-asan-ubsan)	35s
Build OneFlow (cpu-tsan)	38s
Build OneFlow (llvm15)	23m 20s
Find test cache	12s
Find test cache (distributed)	0s
Test suite (cuda-module)	31m 48s
Test suite (cuda-misc)	31m 50s
Test suite (cuda-speed-test)	1s
Test suite (cpu-module)	27m 9s
Test suite (cpu-misc)	17m 25s
Distributed test suite	1s
	3h 38m 26s

Provide feedback