### 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
)
        response = cfn_client.create_stack(
            StackName=stack_name, TemplateBody=template_1, Capabilities=["CAPABILITY_IAM"]
        )
        stack_id = response["StackId"]
        assert stack_id
        wait_until(is_stack_created(stack_id))
        rs = lambda_client.get_function(FunctionName=function_name)
        assert function_name == rs["Configuration"]["FunctionName"]
        assert "x86_64" in rs["Configuration"]["Architectures"]
        result = lambda_client.invoke(FunctionName=function_name)
        result = to_str(result["Payload"].read())
        assert result.strip('" \n') == "hello world"
        template_2 = jinja2.Template(load_template_raw("lambda_inline_code.yaml")).render(
            lambda_return_value="hello globe", arch="arm64", function_name=function_name
        )
        cfn_client.update_stack(
            StackName=stack_name, TemplateBody=template_2, Capabilities=["CAPABILITY_IAM"]
        )
        wait_until(is_stack_updated(stack_id))
        rs = lambda_client.get_function(FunctionName=function_name)
        assert function_name == rs["Configuration"]["FunctionName"]
        assert "arm64" in rs["Configuration"]["Architectures"]
        result = lambda_client.invoke(FunctionName=function_name)
        result = to_str(result["Payload"].read())
        assert result.strip('" \n') == "hello globe"
    finally:
        
        cleanup_stacks([stack_name])