Create Region lookup composition

[mproffitt]

In order to ensure the region is correctly passed to the composition for building the RDS cache cluster, a new composition needs to be created that wraps rdscacheclusters.xdatabases.crossplane.giantswarm.io

This composition will be given all the parameters for the rdscacheclusters along with additional clusterName and clusterNamespace

The purpose of this composition will then

• Block Infrastructure creation
• Look up clusters.cluster.x-k8s.io
• Retrieve spec.infrastructureRef
• Determine if this is an AWS cluster or AWS Managed cluster
  • If not, abort on a composition assertion as this composition currently only supports AWS
• Perform a secondary lookup to retrieve the AWSCluster or AWSManagedCluster resource
• Patch region back to status.region
• Feed status.region to rdscacheclusters.xdatabases.crossplane.giantswarm.io.spec.region
• Unblock infrastructure creation

[mproffitt]

This composition is ready for testing

composition: https://github.com/giantswarm/crossplane-gs-apis/tree/main/crossplane.giantswarm.io/xaws/compositions/rccwithregionlookup

definition: https://github.com/giantswarm/crossplane-gs-apis/blob/main/crossplane.giantswarm.io/xaws/v1alpha1/rccwithregionlookup_types.go

api doc https://github.com/giantswarm/crossplane-gs-apis/blob/main/apidocs/rccwithregionlookups.xaws.crossplane.giantswarm.io.md

[mproffitt]

Testing requires crossplane to be deployed to a management cluster as this requires access to CAPI/CAPA resources

[mproffitt]

Done