Fix serialization assymetry (writeOptional vs plain read), fixed VerifierTett

Author: shmuelhanoch

x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/data/LongRangeBlockBuilder.java

@@ -180,8 +180,8 @@ public TransportVersion getMinimalSupportedVersion() {
 
         @Override
         public void writeTo(StreamOutput out) throws IOException {
-            out.writeOptionalLong(from);
-            out.writeOptionalLong(to);
+            out.writeLong(from);
+            out.writeLong(to);
         }
     }
 }

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/analysis/VerifierTests.java

@@ -1168,7 +1168,7 @@ public void testAggregateOnCounter() {
         assertThat(
             error("FROM test | STATS count(network.bytes_out)", tsdb),
             equalTo(
-                "1:19: argument of [count(network.bytes_out)] must be [any type except counter types or dense_vector],"
+                "1:19: argument of [count(network.bytes_out)] must be [any type except counter types, dense_vector or date_range],"
                     + " found value [network.bytes_out] type [counter_long]"
             )
         );