Implement _log_softmax | feat(torchlib) #4704

Job	Run time
build_docs (ubuntu-latest)	3m 18s
build_docs (windows-latest)	3m 31s
update_readme	6s
test (ubuntu-latest, py310)	3m 50s
test (ubuntu-latest, py39)	3m 49s
test (ubuntu-latest, py38)	3m 53s
test (ubuntu-latest, py310-torch-nightly)	4m 48s
test (ubuntu-latest, py310-onnx-weekly)	3m 53s
test (ubuntu-latest, py310-ort-nightly)	3m 53s
test (windows-latest, py310)	3m 42s
test (windows-latest, py39)	3m 39s
test (windows-latest, py38)	3m 45s
test (windows-latest, py310-torch-nightly)	3m 44s
test (windows-latest, py310-onnx-weekly)	3m 37s
test (windows-latest, py310-ort-nightly)	3m 52s
test (macos-latest, py310)	3m 46s
test (macos-latest, py39)	3m 56s
test (macos-latest, py38)	3m 47s
test (macos-latest, py310-torch-nightly)	4m 31s
test (macos-latest, py310-onnx-weekly)	3m 50s
test (macos-latest, py310-ort-nightly)	3m 50s
Publish Tests Results to Github	20s
	1h 17m 20s

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