ScrollingIndexingWorker should have its own transaction timeout

The ScrollingIndexingWorker Work that is listing documents to index can fail during the scroll because of MongoDB time limit:

MongoExecutionTimeoutException: operation exceeded time limit

this is because the MongoDB query maxTime is set accordingly to the transaction time to live, and this work is using the default transaction timeout duration which is not enough for a large scrolling.

The transaction duration should use a big value like 48h (the same value as for the bulk scroller computation).