Update to ACK runtime v0.56.0, code-generator v0.56.0 (#83)

### Update to ACK runtime `v0.56.0`, code-generator `v0.56.0`

----------

* ACK code-generator `v0.56.0` [release notes](https://github.com/aws-controllers-k8s/code-generator/releases/tag/v0.56.0)
* ACK runtime `v0.56.0` [release notes](https://github.com/aws-controllers-k8s/runtime/releases/tag/v0.56.0)

----------

NOTE:
This PR increments the release version of service controller from `v1.2.2` to `v1.3.0`

Once this PR is merged, release `v1.3.0` will be automatically created for `cloudfront-controller`

**Please close this PR, if you do not want the new patch release for `cloudfront-controller`**

----------

#### stdout for `make build-controller`:

```
building ack-generate ... ok.
==== building cloudfront-controller ====
Copying common custom resource definitions into cloudfront
Building Kubernetes API objects for cloudfront
Generating deepcopy code for cloudfront
Generating custom resource definitions for cloudfront
Building service controller for cloudfront
Running GO mod tidy
Generating RBAC manifests for cloudfront
Running gofmt against generated code for cloudfront
Updating additional GitHub repository maintenance files
==== building cloudfront-controller release artifacts ====
Building release artifacts for cloudfront-v1.3.0
Generating common custom resource definitions
Generating custom resource definitions for cloudfront
Generating RBAC manifests for cloudfront
```

----------

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

Author: ack-bot

.github/workflows/postsubmit.yaml

@@ -0,0 +1,10 @@
+name: Hydrate Go Proxy
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  call-hydrate-go-proxy:
+    uses: aws-controllers-k8s/.github/.github/workflows/reusable-postsubmit.yaml@main