Deprecate JCA CCI support

Closes gh-25287

spring-tx/src/test/java/org/springframework/jca/cci/CciLocalTransactionTests.java

@@ -44,6 +44,7 @@ import static org.mockito.Mockito.verify;
  * @author Thierry Templier
  * @author Chris Beams
  */
+@Deprecated
 public class CciLocalTransactionTests {
 
 	/**

spring-tx/src/test/java/org/springframework/jca/cci/CciTemplateTests.java

@@ -51,6 +51,7 @@ import static org.mockito.Mockito.verify;
  * @author Juergen Hoeller
  * @author Chris Beams
  */
+@Deprecated
 public class CciTemplateTests {
 
 	@Test

spring-tx/src/test/java/org/springframework/jca/cci/EisOperationTests.java

@@ -39,6 +39,7 @@ import static org.mockito.Mockito.verify;
  * @author Thierry Templier
  * @author Chris Beams
  */
+@Deprecated
 public class EisOperationTests {
 
 	@Test