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GH-36973: [CI][Python] Archery linter integrated with flake8==6.1.0 (#36976)

### Rationale for this change

Fix archery lint issues with new version of flake8 dependency.

### What changes are included in this PR?

* Lint errors.

### Are these changes tested?

Yes.

```
$ flake8 --version
6.1.0 (mccabe: 0.7.0, pycodestyle: 2.11.0, pyflakes: 3.1.0) CPython 3.11.4 on Darwin
$ archery lint --python
INFO:archery:Running Python formatter (autopep8)
INFO:archery:Running Python linter (flake8)
INFO:archery:Running Cython linter (cython-lint)
$
```

### Are there any user-facing changes?

No
* Closes: #36973

Authored-by: Dane Pitkin <dane@voltrondata.com>
Signed-off-by: Raúl Cumplido <raulcumplido@gmail.com>