ccl/multiregionccl: fix setting buglet in mr test

Update the cluster setting statement to correctly surround the value
duration in quotations.`5m` to `'5m'`. This was fixed in backports to
release-23.1 (cockroachdb#110052) and release-22.2 (cockroachdb#110053). However, this was not
caught on master due to `TestMultiRegionDataDriven` being skipped.

Informs: cockroachdb#98020
Release note: None

pkg/ccl/multiregionccl/datadriven_test.go

@@ -202,7 +202,7 @@ SET CLUSTER SETTING kv.closed_timestamp.side_transport_interval = '0.1s';
 SET CLUSTER SETTING kv.closed_timestamp.propagation_slack = '0.5s';
 SET CLUSTER SETTING kv.allocator.load_based_rebalancing = 'off';
 SET CLUSTER SETTING kv.allocator.load_based_lease_rebalancing.enabled = false;
-SET CLUSTER SETTING kv.allocator.min_lease_transfer_interval = 5m
+SET CLUSTER SETTING kv.allocator.min_lease_transfer_interval = '5m'
 `,
 					";") {
 					_, err = sqlConn.Exec(stmt)