springboot TomcatReactiveWebServerFactory does not call getTomcatWebServer to create the TomcatWebServer

fix TomcatReactiveWebServerFactory does not call getTomcatWebServer to create the TomcatWebServer #20386

modifies TomcatReactiveWebServerFactory.getWebServer(HttpHandler),and replaces return new TomcatWebServer(tomcat, getPort() >= 0);' with 'return getTomcatWebServer(tomcat);