ec2.SecurityGroup: Observe existing SecurityGroup

[ONordander]

This allows transferring ownership of an existing SecurityGroup.

Signed-off-by: Otto Nordander otto.nordander@resurs.se

Description of your changes

Check if a SecurityGroup exists during controller.Observe to allow transferring ownership of SGs.

Fixes #1175

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

Tested with local Kind cluster.

apiVersion: ec2.aws.crossplane.io/v1beta1
kind: SecurityGroup
metadata:
  name: test-security-group
spec:
  deletionPolicy: Orphan
  providerConfigRef:
    name: local
  forProvider:
    region: eu-central-1
    groupName: test-security-group
    description: Test security group
    vpcId: <vpc-id>

kubectl apply -f securitygroup.yaml
kubectl get securitygroup test-security-group # ID: sg-<ID>
kubectl delete -f securitygroup.yaml
kubectl get securitygroup # No resources found
kubectl apply -f securitygroup.yaml
kubectl get securitygroup test-security-group # ID: sg-<ID> (same ID as previously)

[ONordander]

Found an open issue #1175.

[haarchri]

LGTM - thanks for this