Tails Installer workarounds for UDisks 2 bugs are not robust enough

As #9691 (closed) explains, due to bugs in UDisks 2 we had to add workarounds to Tails Installer. However, as seen e.g. on #10720 (closed) and #10987 (closed), our workarounds are fragile, to the point that we had to disable all automated tests that use Tails Installer, on Jenkins.

I suspect that the same technique(s) can be used to fix all these problems, hence this ticket to track them.

Subtasks

• #10720 (closed)
• #10987 (closed)
• #11590 (closed)

Related issues

• Related to #9691 (closed)
• Related to #15031 (closed)

Original created by @intrigeri on 10988 (Redmine)