If one of the recipient-only shards happens to be chosen as the primary shard, and then the collection is sharded, subsequent movePrimary command leaves behind an empty source collection on the recipient shard. This can lead to ReshardingTest#_checkRecipientPostState() failing when the resharding operation isn't expected to succeed.

Running the movePrimary command before the shardCollection command avoids the issue described in SERVER-54231.