Normalize to positive axis for comparison on GEMM (#26152)
GEMM has 2D input, when given `axis=-1` in DequantizeLinear node
attributes. The check `axis == expected_axis` would fail. However, it
sematically the same (-1 and 1 for 2D GEMM's input). Normalize the check
so we can still perform the quantization for this case.
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Co-authored-by: Edward Chen <18449977+edgchen1@users.noreply.github.com>
