While investigating a flake I noticed that the dbfake workspace builder
executes all database inserts without a transaction. Since our real
wsbuilder implementation utilizes one it makes sense to do here as well.
For example, our normal workspace <-> build relationship is such that a
workspace cannot exist with at least one build. However, our
GetWorkspaces query left joins workspace builds but has types that are
non-nullable, leading to flakes like coder/internal#1103.
Mathias Fredriksson
c3cbd977f1