Do not write BeanDefinition attributes by default

This commit flips the default strategy for BeanDefinition attributes so
that they are not generated in AOT-optimized contexts.

Closes gh-28516

spring-beans/src/test/java/org/springframework/beans/factory/aot/BeanDefinitionMethodGeneratorTests.java

@@ -228,6 +228,23 @@ class BeanDefinitionMethodGeneratorTests {
 		};
 	}
 
+	@Test
+	void generateBeanDefinitionMethodDoesNotGenerateAttributesByDefault() {
+		RootBeanDefinition beanDefinition = new RootBeanDefinition(TestBean.class);
+		beanDefinition.setAttribute("a", "A");
+		beanDefinition.setAttribute("b", "B");
+		RegisteredBean registeredBean = registerBean(beanDefinition);
+		BeanDefinitionMethodGenerator generator = new BeanDefinitionMethodGenerator(
+				this.methodGeneratorFactory, registeredBean, null,
+				Collections.emptyList());
+		MethodReference method = generator.generateBeanDefinitionMethod(
+				this.generationContext, this.beanRegistrationsCode);
+		compile(method, (actual, compiled) -> {
+			assertThat(actual.hasAttribute("a")).isFalse();
+			assertThat(actual.hasAttribute("b")).isFalse();
+		});
+	}
+
 	@Test
 	void generateBeanDefinitionMethodWhenHasAttributeFilterGeneratesMethod() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(TestBean.class);