IGNITE-23769 Compute job cancel race

[valepakh]

https://issues.apache.org/jira/browse/IGNITE-23769

This fixes the specific race when job status was QUEUED at the time of stateMachine.cancelingJob call but the job was already removed from the work queue.
In this case cancelingJob will change the status to CANCELED but the stateMachine.executeJob will still be called causing the IllegalJobStatusTransition exception.
To fix this, make both calls under the lock and check the state before transition. In case this state is detected, don't transition the status and don't run the job, return null from the job and check this state again at the final step, completing the result future with the CancellationException.