Allow a user to enable DML binlog replication when performing DML statements on a ColumnStore table

With the fix for MCOL-4936, DML statements are disabled from getting logged to the binlog. This was done to prevent binlog from growing to large file sizes when performing, say, an LDI statement which inserts millions of rows into a ColumnStore table from a text file. This now limits replication from a ColumnStore cluster to another ColumnStore cluster or to another foreign engine table since DML replication is disabled.

The user should be allowed to enable DML replication in the binlog through a system variable, such as columnstore_replication_dml_binlog.