Speed up reducing auto_date_histo with a time zone (backport of #57933) #57958
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When reducing `auto_date_histogram` we were using `Rounding#round` which is quite a bit more expensive than ``` Rounding.Prepared prepared = rounding.prepare(min, max); long result = prepared.round(date); ``` when rounding to a non-fixed time zone like `America/New_York`. This stops using the former and starts using the latter. Relates to elastic#56124
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run elasticsearch-ci/packaging-sample-unix-archives |
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run elasticsearch-ci/default-distro |
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When reducing
auto_date_histogramwe were usingRounding#roundwhich is quite a bit more expensive than
when rounding to a non-fixed time zone like
America/New_York. Thisstops using the former and starts using the latter.
Relates to #56124