build: Allow pre-commit to keep changes in reformatted code

[terrytangyuan]

Removing the two args --check, --diff that prevent pre-commit from writing the changes back:

  --check                         Don't write the files back, just return the
                                  status. Return code 0 means nothing would
                                  change. Return code 1 means some files would
                                  be reformatted. Return code 123 means there
                                  was an internal error.
  --diff                          Don't write the files back, just output a
                                  diff to indicate what changes Black would've
                                  made. They are printed to stdout so

Writing the changes back would be more convenient since developers don't have to run black commands locally. They only need to do git commit ... once pre-commit is installed.

[spolti]

WHen CI fails because lint, will it show what is different?
Or it this case, it is not importante as now it will write things?

[terrytangyuan]

An example:

pre-commit run
Helm Docs............................................(no files to check)Skipped
black....................................................................Failed
- hook id: black
- files were modified by this hook

reformatted python/huggingfaceserver/huggingfaceserver/async_generate_stream.py

All done! ✨ 🍰 ✨
1 file reformatted.

Flake8...................................................................Passed

No diff will be shown but I don't think it's needed either since they will be fixed automatically.

You can see the diff via git diff.

[spolti]

/lgtm

[yuzisun]

/approve

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This pull-request has been approved by: spolti, terrytangyuan, yuzisun

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