Bump DB2 Driver to 12.1.0.0

It also uses the jakarta.transaction packages, so no need to transform it

bom/application/pom.xml

@@ -126,7 +126,7 @@
         <adal4j.version>1.6.7</adal4j.version>
         <oracle-jdbc.version>23.5.0.24.07</oracle-jdbc.version>
         <derby-jdbc.version>10.16.1.1</derby-jdbc.version>
-        <db2-jdbc.version>11.5.8.0</db2-jdbc.version>
+        <db2-jdbc.version>12.1.0.0</db2-jdbc.version>
         <shrinkwrap.version>1.2.6</shrinkwrap.version>
         <hamcrest.version>2.2</hamcrest.version><!-- The version needs to be compatible with both REST Assured and Awaitility -->
         <junit.jupiter.version>5.10.5</junit.jupiter.version>

build-parent/pom.xml

@@ -85,7 +85,7 @@
         <!-- Database images for JDBC/Reactive/Hibernate tests and devservices -->
         <postgres.image>docker.io/postgres:17</postgres.image>
         <mariadb.image>docker.io/mariadb:10.11</mariadb.image>
-        <db2.image>icr.io/db2_community/db2:11.5.9.0</db2.image>
+        <db2.image>icr.io/db2_community/db2:12.1.0.0</db2.image>
         <mssql.image>mcr.microsoft.com/mssql/server:2022-latest</mssql.image>
         <mysql.image>docker.io/mysql:8.4</mysql.image>
         <oracle.image>docker.io/gvenzl/oracle-free:23-slim-faststart</oracle.image>

extensions/jdbc/jdbc-db2/deployment/pom.xml

@@ -52,11 +52,6 @@
             <artifactId>assertj-core</artifactId>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.eclipse.transformer</groupId>
-            <artifactId>org.eclipse.transformer</artifactId>
-            <version>0.5.0</version>
-        </dependency>
     </dependencies>
 
     <build>

extensions/jdbc/jdbc-db2/deployment/src/main/java/io/quarkus/jdbc/db2/deployment/JDBCDB2Processor.java

@@ -25,6 +25,7 @@
 import io.quarkus.deployment.builditem.NativeImageEnableAllCharsetsBuildItem;
 import io.quarkus.deployment.builditem.SslNativeConfigBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.JPMSExportBuildItem;
+import io.quarkus.deployment.builditem.nativeimage.NativeImageAllowIncompleteClasspathBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.NativeImageConfigBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.ReflectiveClassBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.ServiceProviderBuildItem;
@@ -117,6 +118,14 @@ void registerServiceBinding(Capabilities capabilities,
         dbKind.produce(new DefaultDataSourceDbKindBuildItem(DatabaseKind.DB2));
     }
 
+    @BuildStep
+    NativeImageAllowIncompleteClasspathBuildItem allowIncompleteClasspath() {
+        // The DB2 JDBC driver uses reflection to load classes that are not present in the classpath
+        // Without it, the following error is thrown:
+        // Discovered unresolved type during parsing: com.ibm.db2.jcc.licenses.ConParam. This error is reported at image build time because class com.ibm.db2.jcc.am.Connection is registered for linking at image build time by command line and command line.
+        return new NativeImageAllowIncompleteClasspathBuildItem(Feature.JDBC_DB2.getName());
+    }
+
     @BuildStep
     void addExportsToNativeImage(BuildProducer<JPMSExportBuildItem> jpmsExports) {
         // com.ibm.db2:jcc:11.5.6.0 accesses sun.security.action.GetPropertyAction