databases/cego: upgrade 2.44.8 -> 2.44.9

• Removed legacy method CegoAggregation::setInit/isInit
• Fix in CegoQueryHelper::aggregateTuple, since the field value reference for aggregation field value might be no more valid during the aggregation run, a local copy is created via CegoFieldValue::getLocalCopy.

Submitted by: Bjoern Lemke <lemke@lemke-it.com>