S3 bucket integration for recordings

[yasmagic]

It would be nice if the configuration allowed integration with an Amazon S3 bucket, so recorded files could be uploaded to S3 and deleted from the server automatically, while the webhook pings this information to the configured endpoint.

[jibon57]

You can easily use [post_processing_scripts](https://github.com/mynaparrot/plugNmeet-recorder/tree/main/post_processing_scripts) for this purpose.