I'd like to limit my lambda maximum execution concurrency and I come cross `reserved concurrency` which can be used to achieve this goal. However, once I reserve other lambdas won't be able to use the concurrency which I don't want to impact other lambdas.

How can I set a maximum concurrency on my lambda without using `reserved` one? I am happy to put a queue e.g. SQS, Dynamodb stream, EventBridge etc. but I can't find a solution from them.