Closes https://github.com/coder/internal/issues/716
This prevents a scan over the entire `workspace_build` table by removing
a `join`. This is still imperfect as we are still scanning over the
number of builds for the workspaces in the arguments. Ideally we would
have some index or something precomputed. Then we could skip scanning
over the builds for the correct workspaces that are not the latest.
Steven Masley
ef0d74fb75