Add count to rest output of geo_centroid
#24387
Merged
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Currently we don't write the count value to the
geo_centroidaggregation rest response, but it is provided via the java api and thecount()method in theGeoCentroidinterface. As discussed in #24366, we should add this parameter to the rest output and provide it via thegetProperty()method.This change adds rendering toXContent, adapts unit and integration tests and the response example in the documentation. I'm not sure if adding a parameter to REST requires other updates (like entry into migration docs, rest specs etc...)