Integrate CancelableOperationContext into ReshardingOplogFetcher

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    • Fully Compatible
    • Sharding 2021-04-19
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      Note that the OperationContext constructed within the callback given to Shard::runAggregation() cannot use the shared_ptr<executor::TaskExecutor> given to ReshardingOplogFetcher::schedule() for the CancelableOperationContext. This is because all of its threads may already be consumed waiting for the Shard::runAggregation() task being run on the fixed executor to finish. See also the CancelableOperationContextFactory class mentioned in SERVER-55306.

              Assignee:
              Janna Golden
              Reporter:
              Max Hirschhorn
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