Don't run the csv tests for inlinestats in non-snapshot tests

Author: astefan

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/action/EsqlCapabilities.java

@@ -809,7 +809,7 @@ public enum Cap {
          * Fixes a series of issues with inlinestats which had an incomplete implementation after lookup and inlinestats
          * were refactored.
          */
-        INLINESTATS_V3;
+        INLINESTATS_V3(EsqlPlugin.INLINESTATS_FEATURE_FLAG);
 
         private final boolean enabled;