[Feature] Add the support for musa device support

[hanhaowen-mt]

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[zhouzaida]

HI @hanhaowen-mt , thanks for your contribution. Have you validated this support in downstream repos?

[hanhaowen-mt]

HI @hanhaowen-mt , thanks for your contribution. Have you validated this support in downstream repos?

hi, I am still validating it yet

[hanhaowen-mt]

It is a draft, I am still struggling with many problems.....

[hanhaowen-mt]

目前mmcv已经适配完毕，但是还有些bug需要修复，由于mmengine是一个纯py代码库，所以我想可以先合入也不影响？

[hanhaowen-mt]

为什么会说import不了pytorch....
@zhouzaida

[zhouzaida]

mmengine/.circleci/test.yml

Line 55 in 4a50213

command: pytest tests/test_config tests/test_registry tests/test_fileio tests/test_logging tests/test_utils --ignore=tests/test_utils/test_dl_utils

这一部分是用来测试在没有 pytorch 的环境下，有些模块也可以正常使用，例如 logging 模块。

https://github.com/open-mmlab/mmengine/pull/1453/files#diff-32b2a08b237dff2199ee47140807860c85574eab680060ce98ee4016866ddca1R17 这里 import 了 device 模块，device/utils.py 在这里 import 了 torch（https://github.com/open-mmlab/mmengine/pull/1453/files#diff-32b2a08b237dff2199ee47140807860c85574eab680060ce98ee4016866ddca1R17），所以会报错。

[zhouzaida]

@hanhaowen-mt 你好，已完成 review，请根据 comment 进行修改。另外，想确认一下，此 PR 是否已在 mmdet 进行验证？

[hanhaowen-mt]

@hanhaowen-mt 你好，已完成 review，请根据 comment 进行修改。另外，想确认一下，此 PR 是否已在 mmdet 进行验证？

@zhouzaida 修改完成，open-mmlab/mmdetection#11352 mmdet的pr也提了，都是验证过的

[zhouzaida]

@hanhaowen-mt 最后一轮 comment 了，可以改完再验证一下，没问题就可以合了

[hanhaowen-mt]

@hanhaowen-mt 最后一轮 comment 了，可以改完再验证一下，没问题就可以合了

搞定了，这个pr先合了吧

[zhouzaida]

@hanhaowen-mt 你好，mmengine/hooks/empty_cache_hook.py 这里可以再改一下，然后单元测试根据有没有 cuda skip 掉就行可以。修完这个就可以合了。