### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

Basically we want to only run the lambda when an insert is occurring in DynamoDB.
I tested using Dynobase deleting a record and the lambda still triggered.

```
resource "aws_lambda_event_source_mapping" "event-log" {
	event_source_arn  = aws_dynamodb_table.event-log.stream_arn
	function_name     = module.main.lambda-arn
	starting_position = "LATEST"
	enabled = true # change to false when truncating the table in localstack
	maximum_retry_attempts = 1 # limit retry on failure to 1 for now

	# https://dev.to/aws-builders/filtering-dynamodb-streams-before-lambda-p5p
	filter_criteria { # Doesn't seem to work on LocalStack for now
		filter {
			pattern = jsonencode({
				body = {
					eventName : ["INSERT"]
				}
			})
		}
	}
}
```


### 🧑‍💻 Implementation

_No response_

### Anything else?

 https://dev.to/aws-builders/filtering-dynamodb-streams-before-lambda-p5p
service: str,
        region: str = None,
        signer_factory: Callable[
            [botocore.credentials.Credentials, str, str], botocore.auth.BaseSigner
        ] = botocore.auth.SigV4QueryAuth,
        endpoint_url: str = None,
    ):
        region = region or boto3_session.region_name
        region = region or config.DEFAULT_REGION
        credentials = boto3_session.get_credentials()
        creds = credentials.get_frozen_credentials()
        if not endpoint_url:
            if os.environ.get("TEST_TARGET", "") == "AWS_CLOUD":
                
                resolver: EndpointResolver = boto3_session._session.get_component(
                    "endpoint_resolver"
                )
                endpoint_url = "https://" + resolver.construct_endpoint(service, region)["hostname"]
            else:
                endpoint_url = config.get_edge_url()
        return SigningHttpClient(signer_factory(creds, service, region), endpoint_url=endpoint_url)
    return factory
@pytest.fixture(scope="class")
def dynamodb_client() -> "DynamoDBClient":
    return _client("dynamodb")
@pytest.fixture(scope="class")
def dynamodb_resource() -> "DynamoDBServiceResource":
    return _resource("dynamodb")
@pytest.fixture(scope="class")
def dynamodbstreams_client() -> "DynamoDBStreamsClient":