[test][mysql] Provide the server-time-zone setting in MySqlSourceExampleTest#testConsumingAllEvents (#2364)

(cherry picked from commit a3ddc488d5)

flink-connector-mysql-cdc/src/test/java/com/ververica/cdc/connectors/mysql/source/MySqlSourceExampleTest.java

@@ -44,6 +44,7 @@ public class MySqlSourceExampleTest extends MySqlSourceTestBase {
                         .password(inventoryDatabase.getPassword())
                         .serverId("5401-5404")
                         .deserializer(new JsonDebeziumDeserializationSchema())
+                        .serverTimeZone("UTC")
                         .includeSchemaChanges(true) // output the schema changes as well
                         .build();