feat(kafka create): enable creating long-lived trial instances

[rkpattnaik780]

Add additional billing model eval to create long lived trial instances.

Verification Steps

1. Create a local binary of the CLI:

   make binary

2. Login to an org having quotas for long lived trial instances

   rhoas login --api-gateway staging

3. Run kafka create command setting eval as billing model

   ./rhoas kafka create --name test-instance --billing-model eval --dry-run -v

4. The logs should show that the selected quota object with name "eval".
5. Request body should have billing model "eval".

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation change
• [ ] Other (please specify)

[ziccardi]

If you specify the EVAL billing model, KFM requires that you specify the instance type you want to create (as of today, standard is the only accepted value).

[rkpattnaik780]

Hello @ziccardi I have addressed your comments and off-thread discussions. Just wanted to confirm if the instance-type here is set in Plan along with size or will it be a new parameter in the Kafka create payload?

[ziccardi]

@Hi @rkpattnaik780 ! After yesterday's chat, I looked back into the code and made some tests. I was wrong: specifying the instance type/plan is not mandatory. You can specify only the billing model. Sorry for the confusion.