Provide more options in the SDK for agents to create and update resources in central

[tsjohns9]

The current approach to publishing an API Service with the SDK provides one function that handles the creation of all the resources for an API Service. This function also determines if an API needs to be updated, but can only handle updates on the API Service or the revision.

The mulesoft agents are running into limitations with this approach. The apis that the agent discovers can translate to an API Service, an API Service Revision, or an API Service Instance. The mulesoft agent needs to be able to create or update these resources individually as needed.

It would be helpful from the agents perspective if the SDK provided functions for these operations. The agent should determine what resource to publish, and then it should call the appropriate method to do so.

As an agent developer
I want to have more control over how and when central resources are published
So that I can properly discover APIs from Mulesoft