[tests] diffuser models in model zoo

[1SAA]

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I added diffuser models in model zoo.

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[FrankLeeeee]

Just wanna mark that this PR is part of efforts for #3049

[FrankLeeeee]

Please add diffusers to requirements-test.txt

[github-actions]

The code coverage for the changed files is 67%.

Click me to view the complete report

Name                                                          Stmts   Miss  Cover
---------------------------------------------------------------------------------
tests/kit/model_zoo/__init__.py                                   3      0   100%
tests/kit/model_zoo/diffusers/__init__.py                         1      0   100%
tests/kit/model_zoo/diffusers/diffusers.py                       34      0   100%
tests/test_fx/test_tracer/test_hf_model/test_hf_diffuser.py      47     28    40%
---------------------------------------------------------------------------------
TOTAL                                                            85     28    67%