Fix local-site URL resolvers for the tabs on the user page.

Review Request #2018 — Created Oct. 15, 2020 and submitted — Latest diff uploaded

Review Board
The tabs on the user page were resolving the URLs for the "Review Requests" and
"Reviews" tabs using the basic `reverse` method rather than our
`local_site_reverse` one. This meant that users on a local site would link to
the root view rather than the one within the local site.

Testing done:
- Looked at the user page and checked the link URLs.
- Ran unit tests.

Reviewed at