[AscendNPU-IR][CI] Hotfix: increase testing/npuir pytest f16 tolerance to 1e-2

[mmyy1217]

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[gemini-code-assist]

Code Review

This pull request increases the global default tolerance for float16 comparisons from 1e-3 to 1e-2 in the test common utilities. Feedback suggests that this relaxation is too significant and could mask numerical regressions across the entire test suite; it is recommended to override tolerances for specific unstable test cases instead of modifying the global default.

[gemini-code-assist]

Increasing the global float16 tolerance to 1e-2 is a significant relaxation that could mask numerical regressions across the entire test suite. float16 typically supports a precision around 1e-3. A better approach to handle CI failures is to override the tolerance in specific test cases that exhibit instability on the NPU, rather than globally reducing the sensitivity of all tests.