v5.3.0

[HolyWu]

• Add 4.19-4.26 models.
• Bump PyTorch and Torch-TensorRT to 2.6.0.dev.
• Change default model to 4.18.
• Add trt_static_shape parameter and default to True.
• Fix jaggy/wobbling line issue and broken 4K output.

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This discussion was created from the release v5.3.0.