Switch external remote ant builder for ant.ui to supported JRE version

See #2776 and
#1905

Ant support in Eclipse requires Java 17, the remote builder launch
config still used 11 which resulted in errors on clean build of the
project.

Author: iloveeclipse

ant/org.eclipse.ant.ui/.externalToolBuilders/Build Remote Ant JAR.launch

@@ -13,5 +13,5 @@
 <stringAttribute key="org.eclipse.ui.externaltools.ATTR_LOCATION" value="${workspace_loc:/org.eclipse.ant.ui/buildfiles/buildRemoteExtraJAR.xml}"/>
 <stringAttribute key="org.eclipse.ui.externaltools.ATTR_RUN_BUILD_KINDS" value="full,incremental,auto,"/>
 <booleanAttribute key="org.eclipse.ui.externaltools.ATTR_TRIGGERS_CONFIGURED" value="true"/>
-<stringAttribute key="org.eclipse.jdt.launching.JRE_CONTAINER" value="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11"/>
+<stringAttribute key="org.eclipse.jdt.launching.JRE_CONTAINER" value="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17"/>
 </launchConfiguration>