viable/strict/1790789324: Fix _int_mm CPU corner case (#194682)

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This is to fix #195066 _mkldnn_gemm_i8i8i32_with_blas took leading dimensions from the input strides, but the stride of a size-1 dim is arbitrary and inductor emits 0 for it in some cases. On the other hand, oneDNN's row-major gemm requires lda >= K so it will silently reject the call, causing accuracy failures in workloads like int8 quantized LLM decoding. The PR fixes this corner case and also check this oneDNN ge…

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