### 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
)
            latest_stream_arn = dynamodb_create_table(
                table_name=ddb_table, partition_key="id", stream_view_type="NEW_IMAGE"
            )["TableDescription"]["LatestStreamArn"]
            rs = lambda_client.create_event_source_mapping(
                FunctionName=function_name,
                EventSourceArn=latest_stream_arn,
                StartingPosition="TRIM_HORIZON",
                MaximumBatchingWindowInSeconds=1,
            )
            uuid = rs["UUID"]
            _await_event_source_mapping_enabled(lambda_client, uuid)
            assert poll_condition(is_stream_enabled, timeout=30)
            table = dynamodb_resource.Table(ddb_table)
            table.put_item(Item=items[0])
            
            retry(
                check_expected_lambda_log_events_length,
                retries=10,
                sleep=3,
                function_name=function_name,
                expected_length=1,
                logs_client=logs_client,
            )
            
            lambda_client.update_event_source_mapping(UUID=uuid, Enabled=False)
            time.sleep(2)
            table.put_item(Item=items[1])
            
            check_expected_lambda_log_events_length(