CLOUDP-320196: fix skew detection for disabled compute autoscaling

[s-urbaniak]

Summary

This fixes skew detection if compute autoscaling is disabled but the user still configures remaining autoscaling fields (like instance sizes).

Previously, skew was always detected, causing indefinite reconciles. See the referenced HELP ticket for more details.

Proof of Work

Added new unit test and changed existing unit tests reflecting the changed translation layer behavior.

Checklist

• Have you linked a jira ticket and/or is the ticket in the title?
• Have you checked whether your jira ticket required DOCSP changes?
• Have you checked for release_note changes?
• Have you signed our CLA?

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[josvazg]

One more smart fixup

[s-urbaniak]

@josvazg yes 😞