ClientProxyGenerator - fix app class test for producers

- and use the produced type to test the app class
- follows up on quarkusio#22828

independent-projects/arc/processor/src/main/java/io/quarkus/arc/processor/ClientProxyGenerator.java

@@ -78,7 +78,16 @@ public ClientProxyGenerator(Predicate<DotName> applicationClassPredicate, boolea
     Collection<Resource> generate(BeanInfo bean, String beanClassName,
             Consumer<BytecodeTransformer> bytecodeTransformerConsumer, boolean transformUnproxyableClasses) {
 
-        ResourceClassOutput classOutput = new ResourceClassOutput(applicationClassPredicate.test(bean.getBeanClass()),
+        DotName testedName;
+        // For producers we need to test the produced type
+        if (bean.isProducerField()) {
+            testedName = bean.getTarget().get().asField().type().name();
+        } else if (bean.isProducerMethod()) {
+            testedName = bean.getTarget().get().asMethod().returnType().name();
+        } else {
+            testedName = bean.getBeanClass();
+        }
+        ResourceClassOutput classOutput = new ResourceClassOutput(applicationClassPredicate.test(testedName),
                 generateSources);
 
         ProviderType providerType = new ProviderType(bean.getProviderType());