Revert change in SearchShardsRequest

Author: julian-elastic

server/src/main/java/org/elasticsearch/action/search/SearchShardsRequest.java

@@ -78,15 +78,7 @@ public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
         out.writeStringArray(indices);
         indicesOptions.writeIndicesOptions(out);
-        out.writeOptionalNamedWriteable(query == null || query.supportsVersion(out.getTransportVersion()) ? query :
-        /*
-         * The remote node doesn't support the query we're sending. If this were only
-         * used for _search this could just fail, but for ESQL it's much more convenient
-         * if it pretends that the query is MatchAll. ESQL will frequently be able to
-         * perform the document filtering on the data node in its engine. Slowly.
-         * But correctly.
-         */
-            new MatchAllQueryBuilder());
+        out.writeOptionalNamedWriteable(query);
         out.writeOptionalString(routing);
         out.writeOptionalString(preference);
         out.writeBoolean(allowPartialSearchResults);