Update to ACK runtime v0.20.1, code-generator v0.20.1 (#121)

### Update to ACK runtime `v0.20.1`, code-generator `v0.20.1`

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* ACK code-generator `v0.20.1` [release notes](https://github.com/aws-controllers-k8s/code-generator/releases/tag/v0.20.1)
* ACK runtime `v0.20.1` [release notes](https://github.com/aws-controllers-k8s/runtime/releases/tag/v0.20.1)

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NOTE:
This PR increments the release version of service controller from `v0.1.0` to `v0.1.1`

Once this PR is merged, release `v0.1.1` will be automatically created for `rds-controller`

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

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

```
building ack-generate ... ok.
==== building rds-controller ====
Copying common custom resource definitions into rds
Building Kubernetes API objects for rds
Generating deepcopy code for rds
Generating custom resource definitions for rds
Building service controller for rds
Generating RBAC manifests for rds
Running gofmt against generated code for rds
Updating additional GitHub repository maintenance files
==== building rds-controller release artifacts ====
Building release artifacts for rds-v0.1.1
Generating common custom resource definitions
Generating custom resource definitions for rds
Generating RBAC manifests for rds
```

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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.

apis/v1alpha1/ack-generate-metadata.yaml

@@ -1,11 +1,11 @@
 ack_generate_info:
-  build_date: "2022-09-06T21:49:16Z"
-  build_hash: 87477ae8ca8ac6ddb8c565bbd910cc7e30f55ed0
-  go_version: go1.18.2
-  version: v0.19.3
-api_directory_checksum: 49e40e1f4eba86556bce0a1e14d5888fd21fea2f
+  build_date: "2022-09-12T19:27:20Z"
+  build_hash: 2944c8772f216656d84ee02d392eaca501274c1e
+  go_version: go1.17.5
+  version: v0.20.1
+api_directory_checksum: c701c444da9d673651a14b0629e923dec45ec4fa
 api_version: v1alpha1
-aws_sdk_go_version: v1.44.27
+aws_sdk_go_version: v1.44.93
 generator_config_info:
   file_checksum: 0fb61f01b3715995f51dfc33124c45670c87a257
   original_file_name: generator.yaml