Apply line-length=120 to black format

[WenjieDu]

What does this PR do?

1. config black with line-length=120 to format the code;
2. update .pre-commit-config.yaml;

Before submitting

• I have commented my code, particularly in hard-to-understand areas.
• I have written necessary tests and already run them locally.

[coveralls]

Pull Request Test Coverage Report for Build 10822158814

Details

• 437 of 618 (70.71%) changed or added relevant lines in 157 files are covered.
• 85 unchanged lines in 39 files lost coverage.
• Overall coverage increased (+0.02%) to 83.288%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pypots/cli/env.py	1	2	50.0%
pypots/cli/pypots_cli.py	0	1	0.0%
pypots/data/checking.py	0	1	0.0%
pypots/data/dataset/base.py	7	8	87.5%
pypots/data/load_specific_datasets.py	0	1	0.0%
pypots/data/saving/h5.py	3	4	75.0%
pypots/data/utils.py	2	3	66.67%
pypots/forecasting/csdi/core.py	5	6	83.33%
pypots/imputation/imputeformer/model.py	2	3	66.67%
pypots/imputation/itransformer/model.py	3	4	75.0%

Files with Coverage Reduction	New Missed Lines	%
pypots/imputation/imputeformer/model.py	1	94.74%
pypots/nn/modules/scinet/layers.py	1	91.59%
pypots/clustering/crli/model.py	1	88.16%
pypots/cli/pypots_cli.py	1	0.0%
pypots/base.py	1	71.43%
pypots/data/dataset/base.py	1	83.75%
pypots/nn/modules/reformer/local_attention.py	1	26.22%
pypots/data/load_specific_datasets.py	1	50.0%
pypots/nn/modules/vader/layers.py	1	94.92%
pypots/nn/modules/film/layers.py	1	76.92%

Totals
Change from base Build 10813968295:	0.02%
Covered Lines:	11263
Relevant Lines:	13523

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💛 - Coveralls