Add a warning when we detect graal-sdk

We need to get it out of the extension ecosystem.

Related to quarkusio#39440

core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/JarResultBuildStep.java

@@ -1019,6 +1019,14 @@ private NativeImageSourceJarBuildItem buildNativeImageThinJar(CurateOutcomeBuild
             removedArtifacts.add("org.graalvm.sdk:word");
             removedArtifacts.add("org.graalvm.sdk:collections");
 
+            // complain if graal-sdk is present as a dependency as nativeimage should be preferred
+            if (curateOutcomeBuildItem.getApplicationModel().getDependencies().stream()
+                    .anyMatch(d -> d.getGroupId().equals("org.graalvm.sdk") && d.getArtifactId().equals("graal-sdk"))) {
+                log.warn("org.graalvm.sdk:graal-sdk is present in the classpath. "
+                        + "From Quarkus 3.8 and onwards, org.graalvm.sdk:nativeimage should be preferred. "
+                        + "Make sure you report the issue to the maintainers of the extensions that bring it.");
+            }
+
             doLegacyThinJarGeneration(curateOutcomeBuildItem, outputTargetBuildItem, transformedClasses,
                     applicationArchivesBuildItem, applicationInfo, packageConfig, generatedResources, libDir, allClasses,
                     runnerZipFs, mainClassBuildItem, classLoadingConfig);