Fix indexing overflow issue for blockwise quantization #1784
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matthewdouglas
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Fixes #1782
This PR resolves an issue with int32 overflows in indexing calculations used by the blockwise quantization and dequantization kernels. It also adds tests to verify that quantization and dequantization works on tensors with the maximum supported size of
2**31 - 1elements. Prior to this fix, the quantization kernel would have issues with tensors above2**30elements.