fix: typo in flake8 files

[codewithbear]

This PR contains the following modifications:

- AI Prompt: "There is a minor typo in the .flake8 file likely due to copy-pasting. Specifically, the exclusion list mistakenly includes reana_job_controller.egg-info, whereas it should reference the respective repository's actual name instead of reana_job_controller. Replace reana_job_controller.egg-info with the correct repository specific .egg-info name
Replace dashes with undrescores.
Do not add any new files"

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