Reusing count() for minor refactor in SortedNumericDocValuesRangeQuery

[jainankitk]

Description

Reusing count() for minor refactor in SortedNumericDocValuesRangeQuery

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[jpountz]

Javadocs of LeafReader#numDocs warn that it may run in O(maxDoc) time. I wonder if we should instead extract a method that tells whether it matches all or nothing (without calling numDocs()) and then use it from count() (plus calling numDocs()) and scorerSupplier()?

[jainankitk]

That's a good point. I was initially thinking of doing that by adding relate method similar to PointRangeQuery, but thought this could be simpler. I overlooked this key detail regarding LeafReader#numDocs potentially taking O(maxDoc) time.