🔧 More Bug Fixes 🧹 More Linting

Fixed some minor solo vs etl mode arg bugs in:

• get_study_metadata with args.study_config (also cleared out a deprecated function)
• check_downloads with file_types to check namespace (solo) and not None (etl)
• cli to use manifest_subset (also learned that hyphenated args get interpreted as _ automatically)

What's Changed

• 🔧 Fix Solo Mode Bugs by @migbro in #84

Full Changelog: v2.2.1...v2.2.2