Adjust AddOns::ParamsGenerator::SelfManaged::Base to work with a base trial

In [SM Cloud Licensing Trials] Iteration 1.1: Impl... (&16046 - closed), the creation flow of the SM Ultimate on Cloud Licensing trial record was implemented. [SM Cloud Licensing Trials] Iteration 1.2: Upda... (&16047) utilises it to allow provisioning/deprovisioning, activation, and usage of this trial type.

With this setup, we plan to incorporate Duo Core into Ultimate trials. AddOns::ParamsGenerator::SelfManaged::Base has been tightly coupled to a subscription, which will need to be adapted to also work with a base trial.

Proposal

Result

Next steps (if any)