support fuse layer norm grad for npu #78663

Job	Run time
License and format	1m 5s
Find build cache	10s
Mirror third party dependencies	1m 1s
Collect information about PR and source	11s
Static analysis with clang on diff	39m 9s
Build OneFlow (cu118)	6m 10s
Build OneFlow (cpu)	6m 34s
Build OneFlow (cpu-asan-ubsan)	30s
Build OneFlow (cpu-tsan)	22s
Build OneFlow (llvm15)	6m 3s
Find test cache (distributed)	0s
Find test cache	0s
Test suite	0s
Distributed test suite	0s
	1h 1m 15s

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