Correct logic to re-compute dependencies after absorbing a $sort into query layer

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    • Fully Compatible
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    • v4.0, v3.6
    • Query 2019-12-02, Query 2019-12-16
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      SERVER-39109 inadvertently thwarted an optimization to re-compute the set of fields needed for the aggregation. Instead of re-computing the dependencies in such a scenario, it will get confused because the $cursor stage has already been added and mistakenly report that all fields are needed for the aggregation. We should restore the optimization.

            Assignee:
            Charlie Swanson
            Reporter:
            Charlie Swanson
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              Created:
              Updated:
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