### 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
elif qualifier and not region.lambdas.get(arn).qualifier_exists(qualifier):
        not_found = not_found_error("{0}:{1}".format(arn, qualifier))
    
    if not_found and "localstack-internal-awssdk" in arn:
        
        code = load_file(
            os.path.join(INSTALL_DIR_STEPFUNCTIONS, "localstack-internal-awssdk", "awssdk.zip"),
            mode="rb",
        )
        lambda_client = aws_stack.connect_to_service("lambda")
        lambda_client.create_function(
            FunctionName="localstack-internal-awssdk",
            Runtime=LAMBDA_RUNTIME_NODEJS14X,
            Handler="index.handler",
            Code={"ZipFile": code},
            Role=LAMBDA_TEST_ROLE.format(account_id=get_aws_account_id()),
        )
        not_found = None
    if not_found:
        try:
            forward_result = forward_to_fallback_url(arn, json.dumps(data))
            if forward_result is not None:
                return _create_response(forward_result)
        except Exception as e:
            LOG.debug('Unable to forward Lambda invocation to fallback URL: "%s" - %s', data, e)
        return not_found
    if invocation_type == "RequestResponse":
        context = {"client_context": request.headers.get("X-Amz-Client-Context")}
        time_before = time.perf_counter()
        try: