Add support for addon updates (#48)

Signed-off-by: smcavallo <[email protected]>

Issue #, if available:

Description of changes:
Issue affects `public.ecr.aws/aws-controllers-k8s/eks-controller:v0.1.4`
Currently unable to update Addon with the below exception.
```
  - lastTransitionTime: "2022-08-12T14:48:28Z"
    message: Unable to determine if desired resource state matches latest observed
      state
    reason: |
      InvalidParameter: 1 validation error(s) found.
      - missing required field, UpdateAddonInput.AddonName.
```
the Name is a requirement due to the shape ->  https://github.com/aws/aws-sdk-go/blob/ec3763d8d5abacbf47c0b4296fb5d27821297508/models/apis/eks/2017-11-01/api-2.json#L2128-L2133
This same configuration exists for `CreateAddon | DescribeAddon | DeleteAddon`
With the change in place the Addon upgrades as expected.


By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Author: smcavallo

apis/v1alpha1/generator.yaml

@@ -21,6 +21,9 @@ resources:
         DeleteAddon:
           input_fields:
             AddonName: Name
+        UpdateAddon:
+          input_fields:
+            AddonName: Name
     exceptions:
       errors:
         404:

generator.yaml

@@ -21,6 +21,9 @@ resources:
         DeleteAddon:
           input_fields:
             AddonName: Name
+        UpdateAddon:
+          input_fields:
+            AddonName: Name
     exceptions:
       errors:
         404:

pkg/resource/addon/sdk.go

@@ -1,4 +1,4 @@
-	// We expect the nodegorup to be in 'CREATING' status since we just issued
+	// We expect the nodegroup to be in 'CREATING' status since we just issued
 	// the call to create it, but I suppose it doesn't hurt to check here.
 	if nodegroupCreating(&resource{ko}) {
 		// Setting resource synced condition to false will trigger a requeue of