Support disabling auto_complete on job handler completion

[PSanetra]

The spring-zeebe-sdk supports a autoComplete parameter on JobWorker annotations. It would be nice if pyzeebe could support a similar setting for job handlers. A use case would be the creation of a long running asynchronous background task on job activation. The job might be even marked as completed by a different application instance.

[hoodee86]

Absolutely, this parameter is so important and useful in some complex scenarios.