Fix aggregatorFactory meta merge exception#7504
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Fix HllSketch Metadata merge Exception
A
segmentMetadataquery withmerge = trueraises an exception because it does not implement thegetMergingFactorymethod.{ "error": "Unknown exception", "errorMessage": "[io.druid.query.aggregation.datasketches.hll.HllSketchMergeAggregatorFactory] does not implement getMergingFactory(..)", "errorClass": "io.druid.java.util.common.UOE", "host": null }