Add support for google_compute_autoscaler autoscalingPolicy.cpuUtilization.predictiveMethod

[modular-magician]

Fixes: #8474

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• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

compute: added autoscaling_policy.cpu_utilization.predictive_method field to `google_compute_autoscaler` and `google_compute_region_autoscaler`

Derived from GoogleCloudPlatform/magic-modules#4523

[ghost]

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