SERVER-68828 Create $encryptedBetween aggregation expression

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• Closed

SERVER-69243 Set up separate agg expression walker for range query analysis

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• Closed

SERVER-67208 Generate placeholders for closed range predicates in aggregation expressions

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• Closed

SERVER-68031 Replace encrypted range predicates within $expr

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• Closed

SERVER-66669 Rewrite range predicates to $fleInternalBetween during query analysis

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• Closed