Fix error handling for BatchLinearAlgebra Ops

[CuiYifeng]

This PR is to fix the access to exception vector in error handling. Original implementation may cause a segmentation fault due to out-of-bounds access.

[Copilot]

Pull Request Overview

This PR fixes a critical error handling bug in the BatchLinearAlgebra operations where the original implementation could cause segmentation faults due to out-of-bounds vector access. The fix changes the loop iteration from using element references to using proper indexing.

• Replaces range-based for loop with index-based iteration to prevent out-of-bounds access
• Ensures safe access to the exception vector during error handling

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[EikanWang]

@CuiYifeng , pls. add test cases.

[EikanWang]

Another question is why the CI did not gate the failure.

[CuiYifeng]

@EikanWang Thanks for the question. Segmentation fault won't be triggered until oneAPI is upgraded to 2025.3. Part of exception handling has just been implemented by oneMKL 2025.3. I discovered this issue while verifying oneMKL's change.

Test cases already have been activated in CI:

• test_linalg_xpu.py::TestLinalgXPU::test_det_logdet_slogdet_batched_xpu_float64
• test_linalg_xpu.py::TestLinalgXPU::test_det_logdet_slogdet_xpu_float64
• test_linalg_xpu.py::TestLinalgXPU::test_linalg_lu_family_xpu_float32
• test_linalg_xpu.py::TestLinalgXPU::test_slogdet_xpu_float32
• test_linalg_xpu.py::TestLinalgXPU::test_slogdet_xpu_float64