Test XML, Web, & @TestPropertySource AOT support

See gh-28204, gh-28205

spring-test/src/test/resources/org/springframework/test/context/aot/samples/xml/test-config.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:p="http://www.springframework.org/schema/p"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd">
+
+	<bean id="messageService" class="org.springframework.test.context.aot.samples.common.DefaultMessageService" />
+
+</beans>