Default Azure Kusto SKU

With the new Azure Kusto integration, we are setting the following default SKU:

https://github.com/dotnet/aspire/blob/f43772f872f1bcb386854544a901370700963759/src/Aspire.Hosting.Azure.Kusto/AzureKustoBuilderExtensions.cs#L71-L76

However, this may not be the best default. There are other, lower cost SKUs:

- `Standard_E2ads_v5`
- `Dev(No SLA)_Standard_E2a_v4`

We should decide what is the best default SKU and capacity/instance count for Kusto.

The reason I ask is because after deploying a Kusto cluster, I got an Azure cost control recommendation that says:

> Your cluster currently operates on SKU 'Standard_D11_v2'. Other SKUs are available that suit your data needs better. Scale up to 'Standard_E2ads_v5' and change your instance count to 3 instances. This will reduce cost and potentially improve cluster performance

cc @mitchdenny @MattKotsenas