Update to ACK runtime v0.56.0, code-generator v0.56.0 (#87)

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

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* 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)

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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 `kafka-controller`

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

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

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

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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