When we are ready to deliver EE 9, create a PR to merge the jakarta branch of Stapler into the default branch. This PR should:

• Update the versions of jakarta.servlet:jakarta.servlet-api,jakarta.servlet.jsp.jstl:jakarta.servlet.jsp.jstl-api, and jakarta.servlet.jsp:jakarta.servlet.jsp-api to EE 9 versions
• Replace commons-fileupload2-javax with commons-fileupload2-jakarta-servlet5
• Replace Jetty EE 8 modules with Jetty EE 9 modules.
• Replace all javax imports with jakarta imports for functionality where compatibility is not needed.
• Provide new methods/classes with jakarta imports for functionality where compatibility is needed, and migrate consumers within Stapler to the new methods/classes.

Once it has been released, update the jakarta branch of Jenkins core with the new release.