CosmosDb: Optimize into "IN" operator

[smitpatel]

        [ConditionalFact]
        public virtual void Where_logical_or()
        {
            AssertQuery<Customer>(
                cs => cs.Where(c => c.CustomerID == "ALFKI" || c.CustomerID == "ANATR"),
                entryCount: 2);

            AssertSql(
                @"SELECT c AS query
FROM root c
WHERE ((c[""Discriminator""] = ""Customer"") AND ((c[""CustomerID""] = ""ALFKI"") OR (c[""CustomerID""] = ""ANATR"")))");
        }

Can use IN operator to generate better SQL.