Fix #12685: Add tests for maven-war-plugin and maven-ear-plugin upgrades, extract Quarkus tests

* Fix #12685: Add maven-war-plugin and maven-ear-plugin to plugin upgrade list

Both plugins use reflection on java.util.Properties internals (via
XStream/plexus-archiver) in older versions, which is blocked by the
JDK 17+ module system. Since Maven 4 requires JDK 17+, mvnup should
upgrade these plugins to compatible versions (>= 3.4.0).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: trim test file to stay within 2000-line Checkstyle limit

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: extract Quarkus plugin tests to separate file

Move the Quarkus-specific tests from PluginUpgradeStrategyTest to a new
PluginUpgradeQuarkusTest class to stay well within the 2000-line
Checkstyle limit and leave room for future plugin additions.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: gnodet

impl/maven-cli/src/main/java/org/apache/maven/cling/invoker/mvnup/goals/PluginUpgradeStrategy.java

@@ -149,12 +149,13 @@ public class PluginUpgradeStrategy extends AbstractUpgradeStrategy {
                     DEFAULT_MAVEN_PLUGIN_GROUP_ID,
                     "maven-war-plugin",
                     "3.4.0",
-                    "Versions before 3.3.2 use reflection on java.util.Properties internals, blocked by JDK 17+ required by Maven 4"),
+                    "Older versions use XStream PropertiesConverter which reflects on Properties.defaults field,"
+                            + " blocked by JDK 17+ module system"),
             new PluginUpgrade(
                     DEFAULT_MAVEN_PLUGIN_GROUP_ID,
                     "maven-ear-plugin",
                     "3.4.0",
-                    "Versions before 3.3.0 use reflection via plexus-archiver, blocked by JDK 17+ required by Maven 4"));
+                    "Older versions use plexus-archiver reflection blocked by JDK 17+ module system"));
 
     private static final List<PluginUpgrade> PLUGIN_DEPENDENCY_UPGRADES = List.of(new PluginUpgrade(
             "org.codehaus.mojo",