Fix bug in scatter

[MARD1NO]

修复scatter静态检查的bug

[github-actions]

CI failed, removing label automerge

[github-actions]

Speed stats:

GPU Name: GeForce GTX 1080 

PyTorch resnet50 time: 139.8ms (= 6990.5ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 127.9ms (= 6396.7ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
Relative speed: 1.09 (= 139.8ms / 127.9ms)

PyTorch resnet50 time: 83.6ms (= 4179.6ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 74.2ms (= 3709.0ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
Relative speed: 1.13 (= 83.6ms / 74.2ms)

PyTorch resnet50 time: 57.1ms (= 2854.5ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 47.8ms (= 2389.1ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
Relative speed: 1.19 (= 57.1ms / 47.8ms)

PyTorch resnet50 time: 48.7ms (= 2433.2ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 43.1ms (= 2155.7ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
Relative speed: 1.13 (= 48.7ms / 43.1ms)

PyTorch resnet50 time: 44.1ms (= 2206.1ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 41.0ms (= 2050.6ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
Relative speed: 1.08 (= 44.1ms / 41.0ms)