fix(coderd/database): migrate workspaces.last_used_at to timestamptz (#9699)

coderd/workspaces_test.go

@@ -1515,12 +1515,8 @@ func TestWorkspaceFilterManual(t *testing.T) {
 	t.Run("LastUsed", func(t *testing.T) {
 		t.Parallel()
 
-		// nolint:gocritic // https://github.com/coder/coder/issues/9682
-		db, ps := dbtestutil.NewDB(t, dbtestutil.WithTimezone("UTC"))
 		client, _, api := coderdtest.NewWithAPI(t, &coderdtest.Options{
 			IncludeProvisionerDaemon: true,
-			Database:                 db,
-			Pubsub:                   ps,
 		})
 		user := coderdtest.CreateFirstUser(t, client)
 		authToken := uuid.NewString()