Mute NodeSubclassTests#testReplaceChildren while we await a fix.

x-pack/plugin/sql/src/test/java/org/elasticsearch/xpack/sql/tree/NodeSubclassTests.java

@@ -147,6 +147,7 @@ public class NodeSubclassTests<T extends B, B extends Node<B>> extends ESTestCas
     /**
      * Test {@link Node#replaceChildren} implementation on {@link #subclass}.
      */
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/34775")
     public void testReplaceChildren() throws Exception {
         Constructor<T> ctor = longestCtor(subclass);
         Object[] nodeCtorArgs = ctorArgs(ctor);