### 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
roles = {}
    def _create_role_and_policy(**kwargs):
        role = kwargs["RoleName"]
        policy = kwargs["PolicyName"]
        role_policy = json.dumps(kwargs["RoleDefinition"])
        result = iam_client.create_role(RoleName=role, AssumeRolePolicyDocument=role_policy)
        role_arn = result["Role"]["Arn"]
        policy_document = json.dumps(kwargs["PolicyDefinition"])
        iam_client.put_role_policy(RoleName=role, PolicyName=policy, PolicyDocument=policy_document)
        roles[role] = policy
        return role_arn
    yield _create_role_and_policy
    for role_name, policy_name in roles.items():
        iam_client.delete_role_policy(RoleName=role_name, PolicyName=policy_name)
        iam_client.delete_role(RoleName=role_name)
@pytest.fixture
def firehose_create_delivery_stream(firehose_client, wait_for_delivery_stream_ready):
    delivery_streams = {}
    def _create_delivery_stream(**kwargs):
        if "DeliveryStreamName" not in kwargs:
            kwargs["DeliveryStreamName"] = f"test-delivery-stream-{short_uid()}"
        delivery_stream = firehose_client.create_delivery_stream(**kwargs)
        delivery_streams.update({kwargs["DeliveryStreamName"]: delivery_stream})
        wait_for_delivery_stream_ready(kwargs["DeliveryStreamName"])
        return delivery_stream
    yield _create_delivery_stream
    for delivery_stream_name in delivery_streams.keys():
        firehose_client.delete_delivery_stream(DeliveryStreamName=delivery_stream_name)
@pytest.fixture
def cleanups(ec2_client):