修复box_iou_rotated和sigmoid_focal_loss的npu适配层

[ason-rob]

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Motivation

修复box_iou_rotated和sigmoid_focal_loss的npu适配层

Modification

1. box_iou_rotated: 算子校验shape时重复对boxes1校验，修改为对boxes1和2均校验。
2. sigmoid_focal_loss: 权重计算部分逻辑有错误，修改为与cuda一致的权重计算方式。

BC-breaking (Optional)

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Use cases (Optional)

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Checklist

Before PR:

• I have read and followed the workflow indicated in the CONTRIBUTING.md to create this PR.
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• Bug fixes are covered by unit tests, the case that causes the bug should be added in the unit tests.
• New functionalities are covered by complete unit tests. If not, please add more unit test to ensure the correctness.
• The documentation has been modified accordingly, including docstring or example tutorials.

After PR:

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