[7.x backport] Add more flexibility to MovingFunction window alignment #45159
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Introduce shift field to MovingFunction aggregation.
By default, shift = 0. Behavior, in this case, is the same as before.
Increasing shift by 1 moves starting window position by 1 to the right.
To simply include current bucket to the window, use shift = 1
For center alignment (n/2 values before and after the current bucket), use shift = window / 2
For right alignment (n values after the current bucket), use shift = window.
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Pinging @elastic/es-analytics-geo |
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Backport of #44360
Putting up for CI because we already broke build once with Java 9-isms, and I'd like the BWC tests to run now that this is in master. No need for review