[Feature] Support slurm distributed training for mlu devices

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Motivation

To support slurm distributed training for mlu devices.

Modification

Modify the _init_dist_slurm function in mmengine/dist/utils.py to support slurm distributed training for mlu devices.

BC-breaking (Optional)

Does the modification introduce changes that break the backward-compatibility of the downstream repos?
If so, please describe how it breaks the compatibility and how the downstream projects should modify their code to keep compatibility with this PR.

Use cases (Optional)

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Checklist

1. Pre-commit or other linting tools are used to fix the potential lint issues.
2. The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
3. If the modification has potential influence on downstream projects, this PR should be tested with downstream projects, like MMDetection or MMPretrain.
4. The documentation has been modified accordingly, like docstring or example tutorials.

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Codecov Report

All modified lines are covered by tests ✅

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