[TK-1897] Fix behavior attribute of kubernetes_horizontal_pod_autoscaler_v2(beta2)

[arybolovlev]

Description

When the attributes spec.behavior, spec.behavior.scale_up and spec.behavior.scale_down of the resources kubernetes_horizontal_pod_autoscaler_v2 and kubernetes_horizontal_pod_autoscaler_v2beta2 are not set, the default HPAScalingRules for scale up and scale down are used. This PR makes them computed and thus it won't cause drifts on plan/apply when the attributes are not set.

Additional changes:

• Move HPAv2 spec to schema_horizontal_pod_autoscaler.go since it is used multiple times in different places
• Clean up tests and add the ones with the required attributes only to test how computed ones work

Acceptance tests

• Have you added an acceptance test for the functionality being added?
• Have you run the acceptance tests on this branch?

Output from acceptance testing:

$ make testacc TESTARGS='-count 1 -run ^TestAccKubernetesHorizontalPodAutoscaler*'

=== RUN   TestAccKubernetesHorizontalPodAutoscalerV2_minimal
--- PASS: TestAccKubernetesHorizontalPodAutoscalerV2_minimal (7.09s)
...
=== RUN   TestAccKubernetesHorizontalPodAutoscalerV2Beta2_minimal
--- PASS: TestAccKubernetesHorizontalPodAutoscalerV2Beta2_minimal (7.19s)

Release Note

Release note for CHANGELOG:

r/kubernetes_horizontal_pod_autoscaler_v2: make attribute `spec.behavior` computed
r/kubernetes_horizontal_pod_autoscaler_v2: make attribute `spec.behavior.scale_up` computed
r/kubernetes_horizontal_pod_autoscaler_v2: make attribute `spec.behavior.scale_down` computed
r/kubernetes_horizontal_pod_autoscaler_v2beta2: make attribute `spec.behavior` computed
r/kubernetes_horizontal_pod_autoscaler_v2beta2: make attribute `spec.behavior.scale_up` computed
r/kubernetes_horizontal_pod_autoscaler_v2beta2: make attribute `spec.behavior.scale_down` computed

References

Fix: #1850

Community Note

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[arybolovlev]

Made spec.behavior computed. But since I also moved the whole spec into a diff file\function it is not clear what has changed.

[arybolovlev]

Made spec.behavior.scale_up computed. But since I also moved the whole spec into a diff file\function it is not clear what has changed.

[arybolovlev]

Made spec.behavior.scale_down computed. But since I also moved the whole spec into a diff file\function it is not clear what has changed.

[github-actions]

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