Consider switching to Rufus instead of UUI for Windows users

We receive many reports of users that have problems after installing Tails
with UUI.

Rufus is free software and does not seem to have problems to create our
filesystem correctly.

Maybe we could change the install procedure to recommend Rufus?

Related issues

• Related to #10984 (closed)
• Related to #14448 (closed)
• Blocked by #7938 (closed)

Original created by @emmapeel on 11825 (Redmine)