`failJob` will ignore variables

[jonathanlukas]

Description

When failing a job, a set of variables can be sent along with the command that will then reside in the local scope of the element instance that created the job.

Right now, the test engine ignores this property: https://github.com/camunda/zeebe-process-test/blob/main/engine/src/main/java/io/camunda/zeebe/process/test/engine/GrpcToLogStreamGateway.java#L337-L354

This stops me from testing a behaviour that uses this mechanism: camunda-community-hub/camunda-8-examples#397

Slack thread for reference: https://camunda.slack.com/archives/CSQ2E3BT4/p1717671380113679

[saig0]

Note

Heads up! We are building a new Java testing library for Camunda 8.6. The new library will replace Zeebe Process Test.
Read more about upcoming changes here and stay tuned for updates. 🚀