Implements Resource Access Manager (RAM)

[haarchri]

Description of your changes

Implements Resource Access Manager (RAM)

kubectl apply -f examples/ram/resourceshare.yaml
resourceshare.ram.aws.crossplane.io/sample-ram created

kubectl get resourceshare
NAME         READY   SYNCED   EXTERNAL-NAME
sample-ram   True    True     arn:aws:ram:eu-central-1:255932642927:resource-share/8b44b29d-6e51-44b0-9d30-0f9090400be1

kubectl describe resourceshare.ram.aws.crossplane.io/sample-ram
Name:         sample-ram
Namespace:    
Labels:       <none>
Annotations:  crossplane.io/external-name: arn:aws:ram:eu-central-1:255932642927:resource-share/8b44b29d-6e51-44b0-9d30-0f9090400be1
API Version:  ram.aws.crossplane.io/v1alpha1
Kind:         ResourceShare
Metadata:
  Creation Timestamp:  2021-09-17T14:14:27Z
  Finalizers:
    finalizer.managedresource.crossplane.io
  Generation:        1
  Resource Version:  3886223
  Self Link:         /apis/ram.aws.crossplane.io/v1alpha1/resourceshares/sample-ram
  UID:               ded717bd-9fac-41fe-b5cd-e878a354ab71
Spec:
  Deletion Policy:  Delete
  For Provider:
    Allow External Principals:  true
    Principals:
      123456789012
    Region:  eu-central-1
    Resource AR Ns:
      arn:aws:ec2:eu-central-1:255932642927:transit-gateway/tgw-0d8fdfe8c89fa6b2d
  Provider Config Ref:
    Name:  default
Status:
  At Provider:
  Conditions:
    Last Transition Time:  2021-09-17T14:14:27Z
    Reason:                ReconcileSuccess
    Status:                True
    Type:                  Synced
    Last Transition Time:  2021-09-17T14:14:27Z
    Reason:                Available
    Status:                True
    Type:                  Ready
Events:
  Type    Reason                   Age   From                                         Message
  ----    ------                   ----  ----                                         -------
  Normal  CreatedExternalResource  80s   managed/resourceshare.ram.aws.crossplane.io  Successfully requested creation of external resource

using as external-name the arn because in status deleted you can see resources have same naming

Fixes #603

I have:

• Read and followed Crossplane's [contribution process].
• Run make reviewable test to ensure this PR is ready for review.

How has this code been tested

created, deleted

[AaronME]

LGTM! @haarchri rebase to resolve conflicts and this is good to merge.

Thank you!

[AaronME]

👍🏻