Support Data Dependent Shape (DDS) and NonZero op

[zewenli98]

Description

Revisit NonZero. Support Data Dependent Shape (DDS) and NonZero op in this PR.

Torch-TRT needs static output shapes to create output tensors in the runtime. However, for some ops with DDS, like NonZero, its output shape depends on the input data content, not just the input shape, so we need to propagate the shapes using ShapeProp like ShapeProp(fx_module).propagate(*torch_inputs), and then pass in the output shape to the Torch-TRT runtime.

Fixes #2516

Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

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