Fix LINQ cross join issue with InformixDialect (#3313)

Fixes #3294

Author: bahusoid

src/NHibernate/Dialect/InformixDialect.cs

@@ -333,6 +333,9 @@ public override JoinFragment CreateOuterJoinFragment()
 			return new InformixJoinFragment();
 		}
 
+		/// <inheritdoc />
+		public override bool SupportsCrossJoin => false;
+
 		/// <summary> The SQL literal value to which this database maps boolean values. </summary>
 		/// <param name="value">The boolean value </param>
 		/// <returns> The appropriate SQL literal. </returns>

src/NHibernate/Dialect/InformixDialect0940.cs

@@ -126,10 +126,7 @@ public override JoinFragment CreateOuterJoinFragment()
             return new ANSIJoinFragment();
         }
 
-		/// <inheritdoc />
-		public override bool SupportsCrossJoin => false;
-
-		/// <summary>
+        /// <summary>
         /// Does this Dialect have some kind of <c>LIMIT</c> syntax?
         /// </summary>
         /// <value>False, unless overridden.</value>