Ruby: Keep getURL predicate for easier deprecation

Notice that we still don't fully keep our standard deprecation support,
since the new `getAUrlPart` is still abstract, and therefore will cause
compile errors if not implemented.

Author: RasmusWL

ruby/ql/lib/codeql/ruby/Concepts.qll

@@ -484,6 +484,14 @@ module HTTP {
       /** Gets a node which returns the body of the response */
       DataFlow::Node getResponseBody() { result = super.getResponseBody() }
 
+      /**
+       * DEPRECATED: Use `getAUrlPart` instead.
+       *
+       * Gets a node that contributes to the URL of the request.
+       * Depending on the framework, a request may have multiple nodes which contribute to the URL.
+       */
+      deprecated DataFlow::Node getURL() { result = super.getURL() }
+
       /**
        * Gets a data-flow node that contributes to the URL of the request.
        * Depending on the framework, a request may have multiple nodes which contribute to the URL.
@@ -515,6 +523,14 @@ module HTTP {
         /** Gets a node which returns the body of the response */
         abstract DataFlow::Node getResponseBody();
 
+        /**
+         * DEPRECATED: overwrite `getAUrlPart` instead.
+         *
+         * Gets a node that contributes to the URL of the request.
+         * Depending on the framework, a request may have multiple nodes which contribute to the URL.
+         */
+        deprecated DataFlow::Node getURL() { none() }
+
         /**
          * Gets a data-flow node that contributes to the URL of the request.
          * Depending on the framework, a request may have multiple nodes which contribute to the URL.