[ONNX] replace AT_ASSERT with TORCH_INTERNAL_ASSERT

[titaiwangms]

Stack from ghstack (oldest at bottom):

• -> [ONNX] replace AT_ASSERT with TORCH_INTERNAL_ASSERT #84790

Address the AT_ASSERT in torch/jit/csrc/passes/onnx.

[pytorch-bot]

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[titaiwangms]

@pytorchbot merge -g

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[github-actions]

Hey @AllenTiTaiWang.
You've committed this PR, but it does not have both a 'release notes: ...' and 'topics: ...' label. Please add one of each to the PR. The 'release notes: ...' label should represent the part of PyTorch that this PR changes (fx, autograd, distributed, etc) and the 'topics: ...' label should represent the kind of PR it is (not user facing, new feature, bug fix, perf improvement, etc). The list of valid labels can be found here for the 'release notes: ...' and here for the 'topics: ...'.
For changes that are 'topic: not user facing' there is no need for a release notes label.