backupccl: disable tenants in datadriven test

In cockroachdb#88271 we enabled most DD tests to run as tenants
but we saw an uptick in timeouts on CI. This change disables
these tests from being run as tenants while we dig into the
timeouts.

Release note: None

pkg/ccl/backupccl/datadriven_test.go

@@ -142,7 +142,7 @@ func (d *datadrivenTestState) addServer(t *testing.T, cfg serverCfg) error {
 	var cleanup func()
 	params := base.TestClusterArgs{}
 	params.ServerArgs.ExternalIODirConfig = cfg.ioConf
-	params.ServerArgs.DisableDefaultTestTenant = cfg.disableTenant
+	params.ServerArgs.DisableDefaultTestTenant = true
 	params.ServerArgs.Knobs = base.TestingKnobs{
 		JobsTestingKnobs: jobs.NewTestingKnobsWithShortIntervals(),
 	}