Re-enable single-write-shard transaction commit optimization

SERVER-48307 Transactions that write to exactly one shard and read from one or more other shards may incorrectly indicate failure on retry after successful commit

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• Closed

SERVER-79056 Measure performance for updateOne without shard key with commit optimizations

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• Closed

SERVER-78407 Skip read only shard commit phase for two phase writes

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• In Code Review