Some terraform changes to make arc updates work

[damccorm]

These were needed to fix the terraform config

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[gemini-code-assist]

Summary of Changes

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This pull request addresses configuration issues within the Terraform setup for the Actions Runner Controller (ARC). The changes focus on stabilizing deployments by adjusting Helm release parameters, fixing documentation errors, and implementing lifecycle management for GKE node pools to avoid unexpected resource churn.

Highlights

• Terraform Configuration Updates: Corrected syntax errors in the documentation and updated Helm release configurations to use boolean values instead of strings for improved reliability.
• GKE Node Pool Lifecycle: Added lifecycle blocks to ignore changes to node_config resource labels, preventing unnecessary drift during GKE node pool updates.
• Helm Timeout Adjustments: Increased timeout values for cert-manager and arc Helm releases to 600 seconds to accommodate longer deployment times.

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[damccorm]

R: @jrmccluskey @aIbrahiim

[github-actions]

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