To enable replay protection, the collmod participant command must be called with a sessionId and a txnNumber.
This means that any local command executed by the collmod participant will reuse the sessionId and txnNumber attached to the opCtx, leading to a deadlock since the sessionId is already checked out by the collmod participant command itself.
To solve this we need to create a newly fresh opCtx through an AlternativeClientRegion.

In addition, we'll solve the following issue under this task too:
The OSI fields are not being appended to the command request since this line does not modify the BSON object in place, it just returns a new merged BSONObj that is not used at all.