align view input style with torch

[BBuf]

view和Pytorch对齐输入参数形式，支持flow.Size传参

[github-actions]

Speed stats:

GPU Name: GeForce GTX 1080 

PyTorch resnet50 time: 139.8ms (= 6987.7ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 126.7ms (= 6332.7ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
Relative speed: 1.10 (= 139.8ms / 126.7ms)

PyTorch resnet50 time: 85.0ms (= 4250.7ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 74.0ms (= 3701.5ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
Relative speed: 1.15 (= 85.0ms / 74.0ms)

PyTorch resnet50 time: 61.3ms (= 3065.8ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 47.6ms (= 2380.1ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
Relative speed: 1.29 (= 61.3ms / 47.6ms)

PyTorch resnet50 time: 48.6ms (= 2428.6ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 41.6ms (= 2081.5ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
Relative speed: 1.17 (= 48.6ms / 41.6ms)

PyTorch resnet50 time: 42.9ms (= 2143.0ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 44.3ms (= 2215.9ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
Relative speed: 0.97 (= 42.9ms / 44.3ms)