fix: Moved all dev-requirements into setup.cfg.

[ima-hima]

Description

Checklist

• I have run this code in development and it appears to resolve the stated issue.
• This PR includes tests, or tests are not required/relevant for this PR.
• I have updated CHANGELOG.md and added information about my change.
• If this PR requires a new PyPI release I have bumped the version number.
• I have verified that this PR contains only code changes relevant to this PR.
• If further integration tests are now passing I've edited firebolt.dbtspec to account for this.
• I have pulled/merged from the main branch if there are merge conflicts.
• After pulling/merging main I have run pytest on the included or updated firebolt.dbtspec.

[sonarqubecloud]

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