Update dependency flake8 to v7 - autoclosed #1140

Job	Run time
black	27s
flake8	21s
bandit	19s
pydocstyle	24s
mypy	31s
yamllint	19s
pylint	34s
unittest (3.9, 2.x)	52s
unittest (3.10, 2.x)	46s
unittest (3.12, 2.x)	46s
unittest (3.11, 1.x)	37s
unittest (3.11, 2.x)	34s
Push Package to PyPI	-1s
Publish to GitHub	-1s
Send notification to the Slack	-1s
	6m 27s

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