Enable GraalVM reachability metadata repository

Closes gh-31687

Author: mhalbritter

spring-boot-project/spring-boot-starters/spring-boot-starter-parent/build.gradle

@@ -249,6 +249,11 @@ publishing.publications.withType(MavenPublication) {
 							plugin {
 								delegate.groupId('org.graalvm.buildtools')
 								delegate.artifactId('native-maven-plugin')
+								configuration {
+									metadataRepository {
+										delegate.enabled('true')
+									}
+								}
 								executions {
 									execution {
 										delegate.id('build-native')

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/NativeImagePluginAction.java

@@ -18,10 +18,12 @@
 
 import org.graalvm.buildtools.gradle.NativeImagePlugin;
 import org.graalvm.buildtools.gradle.dsl.GraalVMExtension;
+import org.graalvm.buildtools.gradle.dsl.GraalVMReachabilityMetadataRepositoryExtension;
 import org.graalvm.buildtools.gradle.tasks.BuildNativeImageTask;
 import org.gradle.api.Action;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
+import org.gradle.api.plugins.ExtensionAware;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginExtension;
 import org.gradle.api.tasks.SourceSet;
@@ -53,6 +55,13 @@ public void execute(Project project) {
 		});
 		GraalVMExtension graalVmExtension = project.getExtensions().getByType(GraalVMExtension.class);
 		graalVmExtension.getToolchainDetection().set(false);
+		reachabilityExtensionOn(graalVmExtension).getEnabled().set(true);
+	}
+
+	private static GraalVMReachabilityMetadataRepositoryExtension reachabilityExtensionOn(
+			GraalVMExtension graalVmExtension) {
+		return ((ExtensionAware) graalVmExtension).getExtensions()
+				.getByType(GraalVMReachabilityMetadataRepositoryExtension.class);
 	}
 
 }

spring-boot-project/spring-boot-tools/spring-boot-gradle-test-support/src/main/java/org/springframework/boot/testsupport/gradle/testkit/GradleBuild.java

@@ -126,7 +126,8 @@ private List<File> pluginClasspath() {
 				new File(pathOfJarContaining(JsonView.class)), new File(pathOfJarContaining(Platform.class)),
 				new File(pathOfJarContaining(Toml.class)), new File(pathOfJarContaining(Lexer.class)),
 				new File(pathOfJarContaining("org.graalvm.buildtools.gradle.NativeImagePlugin")),
-				new File(pathOfJarContaining("org.graalvm.reachability.JvmReachabilityMetadataRepository")));
+				new File(pathOfJarContaining("org.graalvm.reachability.GraalVMReachabilityMetadataRepository")),
+				new File(pathOfJarContaining("org.graalvm.buildtools.utils.SharedConstants")));
 	}
 
 	private String pathOfJarContaining(String className) {