variable declaration with cte

I'm having trouble declaring a variable and a cte in one statement. This is something that works with `sqlcmd`.

Statement
```
STMT=$(cat <<'EOF'
DECLARE @bar INT = 1
;with foo as (select @bar as foo)
select * from foo
GO
EOF
)
```

sqlcmd
```
$ sqlcmd -S sqlserver.corp.com -U username -P password -Q "${STMT}"
foo
-----------
1

(1 rows affected)
```

mssql-cli
```
$ mssql-cli --username username --password password --server sqlserver.corp.com --query "${STMT}"
Commands completed successfully.
Msg 137, Level 15, State 2, Line 2
Must declare the scalar variable "@bar".
```

Start by reproducing the provided DECLARE, CTE, and GO statement through mssql-cli, then inspect the query execution and batch handling entry points. Compare the behavior with sqlcmd; done means the same statement executes without the scalar-variable error and returns the expected row.

Written by the indexing model from the issue text.