• MongosProcessInterface::lookupSingleDocument is calling the shard version retry helper on a namespace different from the one targeted by the provided lambda.
• attachCursorToPipeline is closing the original pipeline instead of the cloned one in use.

The bug just affects 4.4.x versions since there was no retry in prior versions and this commit solved the issue in post-4.4 branches.

It's just needed a partial cherry pick of SERVER-47530, not including the sharded collection description changes.