[Persistence] Add supervisor strategy to journal and snapshot options

[Arkatufus]

Changes

Add JournalOptions.SupervisorStrategy and SnapshotOptions.SupervisorStrategy options that was added to Akka v1.5.42

[Aaronontheweb]

Why not just assign a SupervisionStrategy directly?

[Arkatufus]

Because the way it is set up in Akka, it requires a SupervisorStrategyConfigurator

[Arkatufus]

https://github.com/akkadotnet/akka.net/blob/e2d1800fbf8c778157d4917f367edc2d784e5093/src/core/Akka.Persistence/Persistence.cs#L308-L309

https://github.com/akkadotnet/akka.net/blob/e2d1800fbf8c778157d4917f367edc2d784e5093/src/core/Akka/Actor/SupervisorStrategy.cs#L1002-L1021

[Aaronontheweb]

the goal is to assign a supervisor strategy

• the SupervisorConfigurator or whatever it's called is a hack we have to have in order to get HOCON to work.
• We can just do the SupervisorStrategy directly here and generate the configurator for it. That would be the DX-friendly way to do this.

[Arkatufus]

Yes, but that is not how the supervisor strategy being loaded from HOCON the HOCON loader requires that the type being passed in as a SupervisorStrategyConfigurator or it will throw. If you want to do that, we have to change how it is done in Akka.Persistence first.

[Arkatufus]

We can't just "generate" a configurator because it still needs to be loaded from HOCON in the end. And as you said, "the SupervisorConfigurator or whatever it's called is a hack we have to have in order to get HOCON to work". You mean actually use code generator to make a class during compilation time?