Creating Persistent Storage can cause OOM killer to kill gnome-shell

In a Tails VM with 2GiB, it happened that during the creation of the Persistent Storage the OOM killer killed gnome-shell.

Related upstream issues:

• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1028250
• https://gitlab.com/cryptsetup/cryptsetup/-/issues/802