XINFO should use lookupKeyReadOrReply (#8436)

This bug would have let users observe logically expired keys on replicas and
during CLIENT PAUSE WRITE.

(cherry picked from commit f2a5fe3678)

src/t_stream.c

@@ -2716,7 +2716,7 @@ NULL
     key = c->argv[2];
 
     /* Lookup the key now, this is common for all the subcommands but HELP. */
-    robj *o = lookupKeyWriteOrReply(c,key,shared.nokeyerr);
+    robj *o = lookupKeyReadOrReply(c,key,shared.nokeyerr);
     if (o == NULL || checkType(c,o,OBJ_STREAM)) return;
     s = o->ptr;