@ConnectMapping for RSocket handling

The new annotation helps to differentiate the handling of connection
level frames (SETUP and METADATA_PUSH) from the 4 stream requests.

Closes gh-23177

spring-web/src/main/java/org/springframework/web/util/pattern/PathPatternRouteMatcher.java

@@ -105,6 +105,12 @@ public class PathPatternRouteMatcher implements RouteMatcher {
 		public String value() {
 			return this.pathContainer.value();
 		}
+
+
+		@Override
+		public String toString() {
+			return value();
+		}
 	}
 
 }