[test] fixed lazy init test import error

[FrankLeeeee]

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Fixed #3800

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This PR resolved the import errrors.

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[github-actions]

The code coverage for the changed files is 89%.

Click me to view the complete report

Name                                                 Stmts   Miss  Cover
------------------------------------------------------------------------
tests/test_utils/test_lazy_init/lazy_init_utils.py      61     13    79%
tests/test_utils/test_lazy_init/test_distribute.py      74      3    96%
tests/test_utils/test_lazy_init/test_models.py          13      1    92%
------------------------------------------------------------------------
TOTAL                                                  148     17    89%