Rename MinimallyEncodedThreadCurrentUserInfo to ThreadCurrentUserInfo

Summary:
Part of https://linear.app/comm/issue/ENG-6366/rename-minimallyencodedinfo-to-rawinfo

There are no longer any MinimallyEncoded* types in the codebase.

Depends on D10792

Test Plan: flow

Reviewers: ashoat, ginsu, tomek

Reviewed By: tomek

Differential Revision: https://phab.comm.dev/D10805