Add rows processor to GenericTransfer

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Like with the SQLInsertRowsOperator, this PR add's the rows_processor parameter which allows you to post process returned rows by the source hook before inserting them in the destination hook.

I also made the SQLExecuteQueryTrigger non-blocking when used in Airflow 3.2 or higher, this wasn't possible before due to the bug in the CommsDecoder which raised the “Response read out of order” error. Now that this has been fixed in Airflow 3.2, we can make this trigger non-blocking.

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