Fix aten::any.dim truthiness for numeric tensors

[fallintoplace]

Summary

• Convert numeric aten::any.dim inputs into an explicit nonzero mask before reducing.
• Keep bool inputs on the existing bool-to-int reduction path.
• Add deterministic regression tests for cancelling numeric values and negative nonzero values.

Testing

• git diff --check
• bazelisk test //tests/core/conversion/converters:test_reduce was attempted locally. The first run was blocked by missing PyTorch; after installing PyTorch in a local venv and setting TORCH_PATH, Bazel stayed in analysis for several minutes on this local machine and was interrupted before running tests.