### 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
return _client("dynamodbstreams")
@pytest.fixture(scope="class")
def apigateway_client() -> "APIGatewayClient":
    return _client("apigateway")
@pytest.fixture(scope="class")
def cognito_idp_client() -> "CognitoIdentityProviderClient":
    return _client("cognito-idp")
@pytest.fixture(scope="class")
def iam_client() -> "IAMClient":
    return _client("iam")
@pytest.fixture(scope="class")
def s3_client() -> "S3Client":
    return _client("s3")
@pytest.fixture(scope="class")
def s3_resource() -> "S3ServiceResource":
    return _resource("s3")
@pytest.fixture(scope="class")
def s3control_client() -> "S3ControlClient":
    return _client("s3control")
@pytest.fixture(scope="class")
def sqs_client() -> "SQSClient":
    return _client("sqs")
@pytest.fixture(scope="class")
def sns_client() -> "SNSClient":
    return _client("sns")
@pytest.fixture(scope="class")
def cfn_client() -> "CloudFormationClient":
    return _client("cloudformation")
@pytest.fixture(scope="class")
def ssm_client() -> "SSMClient":