Handle job execution interruption for the new autoscaler executor provider

⚠ Depends on gitlab-org/fleeting/fleeting!3 (merged) ⚠

The MR requires update to the right Go module reference after the dependent MR will be merged.

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What does this MR do?

Adds handling of job interruption in the new instance executor and autoscaler executor provider.

Why was this MR needed?

Proper interruption handling is crucial for the expected job execution flow. The new executor was missing this part.

What's the best way to test this MR?

What are the relevant issue numbers?

Related to #29313 (closed)