Change Tester "NONAME" fix process to update all tester information

[preaction]

When a tester changes their name or their e-mail address, it should be easy to fix. Right now, the CPAN::Testers::Backend::Fix::TesterNoname process can fix a tester who is showing up as "NONAME", but it can't fix anything else.

We should change this so that it can look up a tester by e-mail address, and then change both their name and e-mail address.

The new command to run should look like: beam run fix tester_info <old-email> [--name <new-name>] [--email <new-email>].