feat(amp): added prometheusservice amp workspace

[haarchri]

Signed-off-by: haarchri chhaar30@googlemail.com

Description of your changes

added prometheusservice/amp workspaces

Fixes parts of #977

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

NAME      READY   SYNCED   EXTERNAL-NAME
example   True    True     ws-b76772c8-bf88-4408-b3aa-4c2479fa8d81

kubectl describe workspace.prometheusservice.aws.crossplane.io/example
Name:         example
Namespace:    
Labels:       <none>
Annotations:  crossplane.io/external-create-pending: 2022-03-07T18:02:06+01:00
              crossplane.io/external-create-succeeded: 2022-03-07T18:02:06+01:00
              crossplane.io/external-name: ws-d8d7475f-217d-4cec-b1ec-bfe740fb4f16
API Version:  prometheusservice.aws.crossplane.io/v1alpha1
Kind:         Workspace
Metadata:
  Creation Timestamp:  2022-03-07T17:02:06Z
  Finalizers:
    finalizer.managedresource.crossplane.io
  Generation:  2
  Resource Version:  354544
  UID:               d3ef1362-e817-40f8-956f-c4adc4b0919b
Spec:
  Deletion Policy:  Delete
  For Provider:
    Alias:   example
    Region:  us-east-1
    Tags:
      Crossplane - Kind:            workspace.prometheusservice.aws.crossplane.io
      Crossplane - Name:            example
      Crossplane - Providerconfig:  example
  Provider Config Ref:
    Name:  example
Status:
  At Provider:
    Arn:                  arn:aws:aps:us-east-1:436715084175:workspace/ws-d8d7475f-217d-4cec-b1ec-bfe740fb4f16
    Prometheus Endpoint:  https://aps-workspaces.us-east-1.amazonaws.com/workspaces/ws-d8d7475f-217d-4cec-b1ec-bfe740fb4f16/
    Status:
      Status Code:  ACTIVE
    Workspace ID:   ws-d8d7475f-217d-4cec-b1ec-bfe740fb4f16
  Conditions:
    Last Transition Time:  2022-03-07T17:02:07Z
    Reason:                Available
    Status:                True
    Type:                  Ready
    Last Transition Time:  2022-03-07T17:02:07Z
    Reason:                ReconcileSuccess
    Status:                True
    Type:                  Synced
Events:

[AaronME]

LGTM!

Created, destroyed, and tested connection secret. All tests passed.

Thanks, @haarchri.