Adde Hyperscale to SQL Elastic Pool

[BrianVallelunga]

This SKU seems to be missing. It's technically still in preview, but has been for over a year already and has UI support already in the portal, so I'd consider it a safe addition.

What seems to be needed is:

• Adding the Hyperscale PoolSku type
• Adding builder support for highAvailabilityReplicaCount

This seems pretty easy and I'm working on a pull request.

[Larocceau]

Thanks for raising and working on this issue, @BrianVallelunga! Let us know if you need any assistance.

[BrianVallelunga]

I'm realizing it's not quite this simple unfortunately. Elastic pools don't have vcore support yet, so I probably also want to add in support for DbPurchaseModel. I'll see what I can do next week.

[isaacabraham]

Happy to review any proposed design for this.

[BrianVallelunga]

Sorry, we had to skip using Farmer for the project that needed it, so I haven't had a chance to get back at this and don't know when it might be. If I do, I'll be sure to post.