[branch-2.1][improvement](mysql catalog) disable mysql AbandonedConnectionCleanupThread (#36970)

pick (#36655)

fe/fe-core/src/main/java/org/apache/doris/datasource/jdbc/client/JdbcMySQLClient.java

@@ -45,6 +45,8 @@ public class JdbcMySQLClient extends JdbcClient {
 
     protected JdbcMySQLClient(JdbcClientConfig jdbcClientConfig) {
         super(jdbcClientConfig);
+        // Disable abandoned connection cleanup
+        System.setProperty("com.mysql.cj.disableAbandonedConnectionCleanup", "true");
         convertDateToNull = isConvertDatetimeToNull(jdbcClientConfig);
         Connection conn = null;
         Statement stmt = null;