Enable definition of the compute nodes with different sizing

[KonstantinKonson]

In the WCA4z / WXA4z setup the OCP compute nodes can be of different types and sizing:

• worker nodes with Orchestrator workload
• infra nodes for ODF (FDF)
• IFM nodes for AI model inferencing

Therefore, it should be possible to define different CPU/RAM/Storage size for different types of compute nodes (or even for particular nodes).
This should be enabled:

• when an OCP cluster is being initial created
• when some nodes have to be added later