Correct inferring tensor shape for Tensorflow Transform #4509
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Fixes #4364 partially.
The above issue brought into attention that there was a wrong assumption while inferring input tensor shape in TensorflowTransform. It was assumed that for a input node of a graph with unknown dimensions, all the dimensions would be the same, even though that is not true in most cases. For example, the most common tensor shape format for dealing with Image- based models is (batch_size, height, width, channels).
This change replaces this wrong check with more comprehensive method of inferring the input tensor shape.
More tests might need to be added for code coverage.