Parent ticket for follow-on work we can do now that the mongoDB embedded sdk has been removed. Namely:
Remove virtualization/indirection from the following types, if possible

• Transaction coordinator factory
• Transaction coordinator curop
• Transaction coordinator worker curop repository
• PeriodicRunner

Confirm that we cannot remove virtualization/indirection from the following types:

• Replication coordinator (why? mock)
• ServiceEntryPoint (why? mongos/mongod/mongobridge)
• Read_write_concern_defaults_cache_lookup (why? mongod/mongos)
• ProcessInterfaceFactory (why? mongod/mongos. Maybe could be condensed)
• OperationLogger (why? mock)
• IndexBuildsCoordinator (why? Mock – only used in resharding recipient service test)
• Log backend
• AuthZManager, factory (why? mock)
• AuthZSession why(? For test impl)
• Transaction resources init (mongos)

Rename ServiceEntryPointCommon to ServiceEntryPointMongod, and collapse it with the existing ServiceEntryPointMongod.

Any miscellaneous naming-related cleanup that can be done