Merge pull request #1218 from Abdurrahheem:ash/lstm-new-graph-engine-latest

Change model and data for new LSTM layer test #2 #1218

This PR updates test data generation model and data for #26391 since the test was written inccorrect and did not comply with the ONNX specificaiton. Main LSTM output Y should be of dimention 4 as opposed to 3 and of the following form

Y - [seq_length, num_directions, batch_size, hidden_size]

Author: Abdurrahheem