### 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
queue_arn_1 = sqs_queue_arn(queue_url_1)
            mapping_uuid = lambda_client.create_event_source_mapping(
                EventSourceArn=queue_arn_1,
                FunctionName=function_name,
                MaximumBatchingWindowInSeconds=1,
            )["UUID"]
            _await_event_source_mapping_enabled(lambda_client, mapping_uuid)
            sqs_client.send_message(QueueUrl=queue_url_1, MessageBody=json.dumps({"foo": "bar"}))
            retry(
                check_expected_lambda_log_events_length,
                retries=10,
                sleep=1,
                function_name=function_name,
                expected_length=1,
                logs_client=logs_client,
            )
            rs = sqs_client.receive_message(QueueUrl=queue_url_1)
            assert rs.get("Messages") is None
        finally:
            lambda_client.delete_event_source_mapping(UUID=mapping_uuid)
class TestDynamoDBEventSourceMapping:
    def test_dynamodb_event_source_mapping(
        self,
        lambda_client,
        create_lambda_function,
        create_iam_role_with_policy,
        dynamodb_client,
        dynamodb_create_table,
        logs_client,
        check_lambda_logs,