Expose payload functions publicly, to allow clients to be extended.

[lbestatlas]

Pull Request type

• Other (please describe): Providing ability to extend the TaskClient and WorkflowClients, as was possible in the legacy client.

Changes in this PR

#385

In the deprecated conductor-client, the WorkflowClient was not declared as final, this made it possible to extend the Client to add additional ways to retrieve Entities and make other custom calls using the ClientBase methods.

The new WorkflowClient is declared final, so only public classes/methods are available. Custom calls are still possible using ConductorClientRequest.builder(), and ConductorClient. However, there is no publicly exposed way to populate or upload Task/Workflow payloads. Even the ExternalPayloadStorage class is also not publicly exposed.

Make the following methods on the WorkflowClient public:

populateWorkflowOutput
checkAndUploadToExternalStorage
Make the following methods on the TaskClient public:

populateTaskPayloads ( note: evaluateAndUploadLargePayload already public)

Alternatives considered

Refer to #385

[lbestatlas]

@bradyyie have you had a chance to look at this? We need this feature to unblock our use of the spring client. If there are concerns with the implementation please let me know so that I can amend the PR.