When installing OpenSUSE with multiple internal drives, per
https://forums.opensuse.org/t/how-to-transfer-swap-partition-to-os-drive-from-external/169015,
the OSTW installer places the SWAP partition on a (seemingly random) secondary
internal drive.

I don't want this - if I don't select the other drives when asked, it shouldn't
touch them (I realize the quoted post states I did, but it refers to a previous
installation; I've tested both).

Consequently, either don't put the SWAP partiton on another drive unless
multiple have been selected (this is the reason for this issue's designation as
a bug rather than an enhancement) or allow the user to choose separately where
the SWAP partition should be without needing to use the expert partitioner.