### 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
)
            kinesis_create_stream(StreamName=stream_name, ShardCount=1)
            stream_arn = kinesis_client.describe_stream(StreamName=stream_name)[
                "StreamDescription"
            ]["StreamARN"]
            wait_for_stream_ready(stream_name=stream_name)
            stream_summary = kinesis_client.describe_stream_summary(StreamName=stream_name)
            assert stream_summary["StreamDescriptionSummary"]["OpenShardCount"] == 1
            uuid = lambda_client.create_event_source_mapping(
                EventSourceArn=stream_arn,
                FunctionName=function_name,
                StartingPosition="LATEST",
                BatchSize=num_records_per_batch,
            )["UUID"]
            _await_event_source_mapping_enabled(lambda_client, uuid)
            for i in range(num_batches):
                start = time.perf_counter()
                kinesis_client.put_records(
                    Records=[
                        {"Data": json.dumps({"record_id": j}), "PartitionKey": f"test_{i}"}
                        for j in range(0, num_records_per_batch)
                    ],
                    StreamName=stream_name,
                )
                assert (time.perf_counter() - start) < 1  
            invocation_events = _get_lambda_invocation_events(
                logs_client, function_name, expected_num_events=num_batches
            )
            for i in range(num_batches):
                event = invocation_events[i]