Polish "Lazily query attributes when copying from base configuration"

See gh-37343

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/SpringBootAotPluginIntegrationTests-applyingAotPluginDoesNotPreventConfigurationOfJavaToolchainLanguageVersion.gradle

@@ -0,0 +1,11 @@
+plugins {
+	id 'org.springframework.boot'
+	id 'org.springframework.boot.aot'
+	id 'java'
+}
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(17))
+    }
+}