fix(annotations): fix missing annotations & readme / makefile fix typos

[haarchri]

Signed-off-by: Christopher Haar chhaar30@googlemail.com

Description of your changes

1. fix missing annotations after apply k8s objects via provider-kubernetes in compositions - removed obj.SetAnnotations
   old behavior:

kubectl describe object.kubernetes.crossplane.io/example
Name:         example
Namespace:    
Labels:       crossplane.io/claim-name=
              crossplane.io/claim-namespace=
              crossplane.io/composite=example
Annotations:  crossplane.io/external-name: example
API Version:  kubernetes.crossplane.io/v1alpha1
Kind:         Object
Metadata:
  Creation Timestamp:  2021-07-25T21:25:43Z
  Finalizers:
    finalizer.managedresource.crossplane.io
  Generate Name:  example-
  Generation:     1
  Owner References:
    API Version:     platform.xxx.intern/v1alpha1
    Controller:      true
    Kind:            Secret
    Name:            example
    UID:             e4490153-2bd7-4111-a590-5f5af02b75b9
  Resource Version:  1768822
  Self Link:         /apis/kubernetes.crossplane.io/v1alpha1/objects/example
  UID:               28587d65-322a-4dd0-a321-c769674a4613
Spec:
  For Provider:
    Manifest:
      API Version:  v1
      Data:
        Team:  xxxx
      Kind:    Secret
      Metadata:
        Annotations:
          abc/autogenerate:  password
          def/type:          string
        Namespace:                                       api-service
      Type:                                              Opaque
  Provider Config Ref:
    Name:  kubernetes-provider
Status:
  At Provider:
    Manifest:
      API Version:  v1
      Data:
        Team:  xxxx
      Kind:    Secret
      Metadata:
        Annotations:
          kubectl.kubernetes.io/last-applied-configuration:  {"apiVersion":"v1","data":{"team":"xxxx"},"kind":"Secret","metadata":{"annotations":{"abc/autogenerate":"password","def/type":"string"},"namespace":"api-service"},"type":"Opaque"}
        Creation Timestamp:                                  2021-07-25T21:25:43Z
        Name:                                                example
        Namespace:                                           api-service
        Resource Version:                                    1768821
        Self Link:                                           /api/v1/namespaces/api-service/secrets/example
        UID:                                                 f0ca82c6-6c0b-4657-979e-4d8f17d01f40
      Type:                                                  Opaque

fixed behavior

kubectl describe object.kubernetes.crossplane.io/example
Name:         example
Namespace:    
Labels:       crossplane.io/claim-name=
              crossplane.io/claim-namespace=
              crossplane.io/composite=example
Annotations:  crossplane.io/external-name: example
API Version:  kubernetes.crossplane.io/v1alpha1
Kind:         Object
Metadata:
  Creation Timestamp:  2021-07-25T21:25:43Z
  Finalizers:
    finalizer.managedresource.crossplane.io
  Generate Name:  example-
  Generation:     1
  Owner References:
    API Version:     platform.xxx.intern/v1alpha1
    Controller:      true
    Kind:            Secret
    Name:            example
    UID:             e4490153-2bd7-4111-a590-5f5af02b75b9
  Resource Version:  1768822
  Self Link:         /apis/kubernetes.crossplane.io/v1alpha1/objects/example
  UID:               28587d65-322a-4dd0-a321-c769674a4613
Spec:
  For Provider:
    Manifest:
      API Version:  v1
      Data:
        Team:  xxxx
      Kind:    Secret
      Metadata:
        Annotations:
          abc/autogenerate:  password
          def/type:          string
        Namespace:                                       api-service
      Type:                                              Opaque
  Provider Config Ref:
    Name:  kubernetes-provider
Status:
  At Provider:
    Manifest:
      API Version:  v1
      Data:
        Team:  xxxx
      Kind:    Secret
      Metadata:
        Annotations:
          abc/autogenerate: password
          def/type: string
          kubectl.kubernetes.io/last-applied-configuration:  {"apiVersion":"v1","data":{"team":"xxxx"},"kind":"Secret","metadata":{"annotations":{"abc/autogenerate":"password","def/type":"string"},"namespace":"api-service"},"type":"Opaque"}
        Creation Timestamp:                                  2021-07-25T21:25:43Z
        Name:                                                example
        Namespace:                                           api-service
        Resource Version:                                    1768821
        Self Link:                                           /api/v1/namespaces/api-service/secrets/example
        UID:                                                 f0ca82c6-6c0b-4657-979e-4d8f17d01f40
      Type:                                                  Opaque

2. fix Readme apiVersion: pkg.crossplane.io/v1alpha1 to apiVersion: pkg.crossplane.io/v1
3. fix Makefile include without make submodule -include will silently skip missing files, which allows us to load those files with a target in the Makefile.

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

make reviewable

[turkenh]

Thank you @haarchri!