[ENG-327] [OATHPIT] Throw CloudFiles into the Oath Pit

[cslzchen]

Ticket

https://openscience.atlassian.net/browse/ENG-327

Purpose

Enable and update the CloudFiles provider for aiohttp3.

Changes

Code

• Removed context manager when making request
• Improved import style

Tests

• Fixed import and usage for multidict
• Remove unused imports and improve style
• Fixed JSON response parsing
• Removed --ignore for pytest since all providers have been converted

Side effects

N / A

QA Notes

N / A

CloudFiles was the original storage provider for OSFStorage which has been deprecated since early 2018. It is only not testable by QA.

Deployment Notes

No

[cslzchen]

Update: PR rebased and conflicts fixed after GitLab merge. In addition, removed --ignore for pytest since all providers have been converted.