Fix serialization compiler warnings with Java 18

As of Java 18, the serial lint warning in javac has been expanded to
check for class fields that are not marked as `Serializable`.
See https://www.oracle.com/java/technologies/javase/18all-relnotes.html#JDK-8202056

In the Spring Framework codebase, this can happen with `Map`, `Set` or
`List` attributes which are often assigned with an unmodifiable
implementation variant. Such implementations are `Serializable` but
cannot be used as field types.

This commit ensures that the following changes are applied:
* fields are marked as transient if they can't be serialized
* classes are marked as `Serializable` if this was missing
* `@SuppressWarnings("serial")` is applied where relevant

spring-jdbc/src/main/java/org/springframework/jdbc/support/rowset/ResultSetWrappingSqlRowSet.java

@@ -67,11 +67,13 @@ public class ResultSetWrappingSqlRowSet implements SqlRowSet {
 	/** use serialVersionUID from Spring 1.2 for interoperability. */
 	private static final long serialVersionUID = -4688694393146734764L;
 
-
+	@SuppressWarnings("serial")
 	private final ResultSet resultSet;
 
+	@SuppressWarnings("serial")
 	private final SqlRowSetMetaData rowSetMetaData;
 
+	@SuppressWarnings("serial")
 	private final Map<String, Integer> columnLabelMap;