[focom] Define FocomClusterRequest CRD and create focom controller managing its lifecycle

[adetalhouet]

See design details here: https://docs.google.com/presentation/d/1iyE_XLkBJkl_ClYsE_vRnEkm8Ica7YE0/edit#slide=id.p1

In scope:

• creation of the API and the initial controller reconciling it. Here is an example CR.

  • the clusterTempalteRef should point to an existing PackageVariant from the o-cloud referenced in ocloudRef

    apiVerson: focom.provisioning.oran.org
    kind: FocomClusterRequest
    metadata:
    name: ExampleCluster
    namespace: default
    spec:
    ocloudRef: O-Cloud1
    clusterTemplateRef: ocloud1-cluster-template1
    siteRef: 

• controller should use the ocloudRef to identify the IMS endpoint to send the request to.

• controller should use the clusterTemplateRef field to identify the PackageVariant to deploy from the ocloudRef IMS

• controller should provide the siteRef to identify the target site where the cluster should be.

• controller should use FocomClusterRequest as the NBI, and emit a ClusterRequest to the IMS of the identified ocloudRef using the k8s api.

Out of scope:

• Status monitoring and reporting