Better handling of invalid SQL Server connector configuration

When the filter specified in column.include.list applied to the list of columns of a certain table produces an empty list, the connector still tries to perform a knowingly invalid SQL query that selects no columns.

Steps to reproduce

1. Configure the connector with column.include.list=.^ – there's no column name that will match this regular expression.
2. Run the connector.

Expected behavior

1. The connector doesn't attempt to perform a knowingly invalid query.
2. There is a log message that helps identify the invalid configuration.

Actual behavior

Producer failure   [io.debezium.pipeline.ErrorHandler]
io.debezium.DebeziumException: org.apache.kafka.connect.errors.ConnectException: Snapshotting of table testDB.dbo.tablea failed
...
Caused by: org.apache.kafka.connect.errors.ConnectException: Snapshotting of table testDB.dbo.tablea failed
...
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near the keyword 'FROM'.
...