Convert OAuth1 handshake tokens to new modular temporary tokens

Summary: Ref T10603. Swap these over and give them nice UI strings.

Test Plan:

• Refreshed a Twitter OAuth link.
• Unlinked and re-linked a Twitter account.
• Viewed the new type in Config → Temporary Tokens.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10603

Differential Revision: https://secure.phabricator.com/D15480