Unsqueeze operator with dynamic inout

[apbose]

The PR consists of the following changes-

1. Change the use_zeroes parameter to false in shuffle_layer->setReshapeDimensions(), else it is resulting in empty tensor
2. Test test_unsqueeze.cpp - to test the above changes

In the case of dynamic inputs eg: [1,-1], the util::unsqueezeDims() was changing the dimension [1,1,0] when value 1 was to be inserted at index 1. In shuffle_layer->setReshapeDimensions(), the 0 in the third dimension causes it to get the dimension from input tensor which has length 0 in that dimension. The use_zeroes parameter is set to false so that [1,-1] is reshaped to [1,1,-1] instead.
Fix for issue 1596.

Please delete options that are not relevant and/or add your own.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project (You can use the linters)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas and hacks
• I have made corresponding changes to the documentation
• I have added tests to verify my fix or my feature
• New and existing unit tests pass locally with my changes
• I have added the relevant labels to my PR in so that relevant reviewers are notified

[github-actions]

Code conforms to C++ style guidelines

[github-actions]

Code conforms to Python style guidelines

[github-actions]

Code conforms to C++ style guidelines

[github-actions]

Code conforms to Python style guidelines

[peri044]

@apbose The test-core-cpp was failing probably due to TensorRT installation. I've restarted the pipeline. Can you fix any failing tests once it completes ?

[narendasan]

LGTM