Starter Pools: let customers specify the node size

[martin_bode]

Currently the size of Starter Pools is pre-set and can't be changed:

• node size: medium
• number of nodes: 1 - 10

I think medium nodes are over-sized for average ad-hoc notebook sessions.

I'd appreciate if customers could change those settings.

https://learn.microsoft.com/en-us/fabric/data-engineering/spark-compute#starter-pools