[Core] Add c++ API for setting max_task_retries

[patrickiamy]

Description

It seems there is no way to set max_task_retries with c++ API. Could we add related API? It's important for enabling fault tolerance in c++ applications based on Ray.

Possible implementation

We may make the following change to enable users to set the option?

master/cpp/include/ray/api/actor_creator.h
Add an API for max_task_retries

master/cpp/include/ray/api/task_options.h
Add the option into ActorCreationOptions

master/cpp/src/ray/runtime/task/native_task_submitter.cc
Pass the option to ray::core::ActorCreationOptions in NativeTaskSubmitter::CreateActor function

[jjyao]

Hi @patrickiamy feel free to contribute!