Can't install due to mounted Swap partitions

In certain circumstances, such as virtualized environments, the system may automatically mount Swap partitions during a Live session boot. Calamares does not unmount Swap partitions automatically unless it’s started like this:

sudo -E start-calamares

Note that running Calamares directly, i.e., sudo calamares will not unmount Swap partitions, and if the target device has mounted partitions, the installation will not continue.