[NPU] Add unit test test_stride_npu

[Tongkaio]

• FillKernel 支持 cann 版本小于 7.0.0
• NPU 增加 stride kernel 的单测：test_stride_npu，参考：Paddle -> test/legacy_test/test_stride.py

---

stride 开发可参考文档：https://ku.baidu-int.com/d/2lTfAojLRt6lWH

[paddle-bot[bot]]

Thanks for your contribution!

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}