Fix Quarkus build: use -Dlatest.java.version=21 and avoid Java 22+ unnamed variables in core tests

Signed-off-by: Marvin Froeder <velo.br@gmail.com>

Author: velo

querydsl-examples/querydsl-example-jpa-quarkus/Dockerfile

@@ -3,6 +3,5 @@ COPY --chown=quarkus:quarkus . /code/
 USER quarkus
 WORKDIR /code
 
-RUN mkdir -p querydsl-libraries/querydsl-core/target/test-classes
-RUN ./mvnw -ntp -B install -Pquickbuild -pl :querydsl-jpa -am -Dtoolchain.skip -Dgcf.skip -Dmaven.test.skip=true
+RUN ./mvnw -ntp -B install -Pquickbuild -pl :querydsl-jpa -am -Dtoolchain.skip -Dgcf.skip -Dlatest.java.version=21
 RUN ./mvnw verify -Dnative -Pexamples -pl :querydsl-example-jpa-quarkus -Dtoolchain.skip -Dgcf.skip -Dlatest.java.version=21

querydsl-libraries/querydsl-core/src/test/java/com/querydsl/core/group/GroupByIterateTest.java

@@ -183,7 +183,7 @@ public void map3() {
       @SuppressWarnings("unchecked")
       var pair = (Pair<Integer, Pair<Integer, String>>) array[1];
       var first = pair.getFirst();
-      var comments = posts.computeIfAbsent(first, _ -> new LinkedHashMap<Integer, String>());
+      var comments = posts.computeIfAbsent(first, key -> new LinkedHashMap<Integer, String>());
       var second = pair.getSecond();
       comments.put(second.getFirst(), second.getSecond());
     }

querydsl-libraries/querydsl-core/src/test/java/com/querydsl/core/group/GroupByMapTest.java

@@ -203,7 +203,7 @@ public void map3() {
       @SuppressWarnings("unchecked")
       var pair = (Pair<Integer, Pair<Integer, String>>) array[1];
       var first = pair.getFirst();
-      var comments = posts.computeIfAbsent(first, _ -> new LinkedHashMap<Integer, String>());
+      var comments = posts.computeIfAbsent(first, key -> new LinkedHashMap<Integer, String>());
       var second = pair.getSecond();
       comments.put(second.getFirst(), second.getSecond());
     }

querydsl-libraries/querydsl-core/src/test/java/com/querydsl/core/util/ConstructorUtilsTest.java

@@ -63,7 +63,7 @@ private <C> Constructor<C> getConstructor(Class<C> type, Class<?>[] givenTypes)
     Constructor<C> rv = null;
     try {
       rv = ConstructorUtils.getConstructor(type, givenTypes);
-    } catch (NoSuchMethodException _) {
+    } catch (NoSuchMethodException e) {
       fail(
           "",
           "No constructor found for "