MariaDbClob fails to compile with JDK 26+

Starting in JDK 26+, `java.sql.Blob` and `java.sql.Clob` both implement `close()`. This change causes MariaDbClob to fail to compile with the following error:

```
src/main/java/org/mariadb/jdbc/MariaDbClob.java:14: error: types Clob and Blob are incompatible;
public class MariaDbClob extends MariaDbBlob implements Clob, NClob, Serializable {
^
class MariaDbClob inherits unrelated defaults for close() from types Clob and Blob
```

The JDK change was https://bugs.openjdk.org/browse/JDK-8369918