Replace TaskOptions with a Dapr specific class like WorkflowActtivityOptions

[artur-ciocanu]

Describe the proposal

Ideally Dapr Workflow should not expose any Durable Task library classes, this makes it tightly coupled to Durable Task library. We already have Dapr Workflow specific classes that hide a lot of details so we should continue down this path.

The proposal is to replace TaskOptions with a Dapr specific class like WorkflowActtivityOptions.