### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When attempting to sign some document using Localstack KMS inside a lambda container (also running on localstack), the localstack KMS listener returns some unknown error.

The KMS key and lambda containers have been created from the same CDK app deploy, and I can see all the resources in the localstack web console.

The test application I'm using to prove this behaviour is available here:
https://github.com/LukaHedt/localstack_kms_test

Instructions to run are in the main Readme, and the `/localstack/Readme.md` file.

`aws-sdk` returns an unknown error, and the localstack docker logs that I receive are available here:
https://pastebin.com/58Z3fXi3

Have done an amount of testing and can confidently claim the following:
- Have tested on multiple machines with the same outcome
- Doesn’t make a difference if I specify an ARN or a KeyID in the signing request
- Downgrading localstack versions either didn’t make a difference, or I couldn’t actually deploy a localstack container with version 0.12.20 or lower.

### Expected Behavior

KMS Sign should return a signature for the given payload.

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

Test application demonstrating the current behaviour is available here:

https://github.com/LukaHedt/localstack_kms_test

Full instructions to run are in the `/localstack/Readme.md` file.


### Environment

```markdown
- OS: MacOS Monteray 12.3
- LocalStack: 0.14.0
```


### Anything else?

_No response_
record["dynamodb"]["StreamViewType"] = stream_spec["StreamViewType"]
        elif action == "CreateTable":
            if response.status_code == 200:
                table_definitions = (
                    DynamoDBRegion.get().table_definitions.get(data["TableName"]) or {}
                )
                if "TableId" not in table_definitions:
                    table_definitions["TableId"] = long_uid()
                if "SSESpecification" in table_definitions:
                    sse_specification = table_definitions.pop("SSESpecification")
                    table_definitions["SSEDescription"] = SSEUtils.get_sse_description(
                        sse_specification
                    )
                content = json.loads(to_str(response.content))
                if table_definitions:
                    table_content = content.get("Table", {})
                    table_content.update(table_definitions)
                    content["TableDescription"].update(table_content)
                    update_response_content(response, content)
                if "StreamSpecification" in data:
                    create_dynamodb_stream(
                        data, content["TableDescription"].get("LatestStreamLabel")
                    )
                if data.get("Tags"):
                    table_arn = content["TableDescription"]["TableArn"]
                    DynamoDBRegion.TABLE_TAGS[table_arn] = {
                        tag["Key"]: tag["Value"] for tag in data["Tags"]
                    }
            event_publisher.fire_event(
                event_publisher.EVENT_DYNAMODB_CREATE_TABLE,