Add integration test for C# actor runtime components with Dapr runtime

[lukekim]

[ChrisProlls]

I will give a try on this one, but before let me ask few questions

• Have you any docs about the current test projects architecture ?
• Can I reuse some existing test components ?
• I already see some tests around the Actors component (Dapr.Actors.AspNetCore.IntegrationTest and Dapr.Actors.Test), can I be inspired by it?
• What do you call integration test ?

Thanks