Jakarta EE 9 migration

Upgrades many dependency declarations; removes old EJB 2.x support and outdated Servlet-based integrations (Commons FileUpload, FreeMarker JSP support, Tiles).

Closes gh-22093
Closes gh-25354
Closes gh-26185
Closes gh-27423
See gh-27424

spring-context/src/test/java/example/scannable/AutowiredQualifierFooService.java

@@ -18,7 +18,7 @@ package example.scannable;
 
 import java.util.concurrent.Future;
 
-import javax.annotation.PostConstruct;
+import jakarta.annotation.PostConstruct;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;