[GR-67449] Fix TruffleString.EqualNode to avoid nested node and extra field

PullRequest: graal/21436

Author: eregon

truffle/src/com.oracle.truffle.api.strings/src/com/oracle/truffle/api/strings/TruffleString.java

@@ -5968,7 +5968,7 @@ static boolean sameObject(AbstractTruffleString a, AbstractTruffleString b, Enco
 
         @Fallback
         static boolean check(AbstractTruffleString a, AbstractTruffleString b, Encoding expectedEncoding,
-                        @Cached Node node,
+                        @Bind Node node,
                         @Cached InlinedConditionProfile managedProfileA,
                         @Cached InlinedConditionProfile nativeProfileA,
                         @Cached InlinedConditionProfile managedProfileB,