fix peft cpu ut failure

[yao-matrix]

in to only data of param moved to the specified device, but SCB and CB still keep in the before device, this will lead to peft below ut fail

pytest -rA tests/test_gpu_examples.py::TestLoftQ::test_bloomz_loftq_8bit[cpu]

Since in this code https://github.com/huggingface/peft/blob/main/src/peft/utils/integrations.py#L107, peft will find weight.data has different placement from SCB, so kind of only partial to was done.

[yao-matrix]

@matthewdouglas @jiqing-feng , pls help review and comment, thx very much.

[matthewdouglas]

Makes sense, thanks! Let's just fix the lint issue and we can merge it.

Related issue: #1332

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[yao-matrix]

@matthewdouglas , fixed lint, thx very much.

[matthewdouglas]

Thanks @yao-matrix. I've taken this a little bit further in #1769 and will merge that instead.