Allow to configure KFM in dynamic scaling mode

[machi1990]

KFM can be configured in dynamic scaling mode i.e the scaling mode is auto as opposed to the current manual mode which requires one to have an already provisioned data plane cluster.
When KFM is running in auto mode:

• the OCM credentials are needed
• KFM will auto provision needed data plane clusters and terraform them
• KFM will delete all empty clusters provided that there will be at least one data plane cluster in the region

See https://github.com/bf2fc6cc711aee1a0c2a/kas-fleet-manager/blob/main/docs/architecture/data-plane-osd-cluster-dynamic-scaling.md for the different logic.

The scale up/down and various other configurations can be controlled via configuration knobs explained in https://github.com/bf2fc6cc711aee1a0c2a/kas-fleet-manager/blob/main/config/dynamic-scaling-configuration.yaml