[Feat] Add nodeSelectorTerms for vllmRunTimes

[mahmoudk1000]

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Summary of Changes

Hello @mahmoudk1000, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the VLLMRuntime custom resource by adding support for Kubernetes nodeSelectorTerms. This feature provides users with fine-grained control over where their VLLM pods are scheduled within the cluster, enabling better resource utilization and adherence to specific node requirements.

Highlights

• Node Affinity Configuration: Introduced the nodeSelectorTerms field within the DeploymentConfig of the VLLMRuntime custom resource, allowing users to specify node affinity rules for VLLM deployments.
• Kubernetes Integration: Implemented the logic in the controller to translate the nodeSelectorTerms from the VLLMRuntime spec into the PodSpec.Affinity.NodeAffinity.RequiredDuringSchedulingIgnoredDuringExecution.NodeSelectorTerms of the generated Kubernetes Deployment.
• CRD and Deepcopy Updates: Updated the Custom Resource Definition (CRD) schema and the generated deepcopy methods to support the new nodeSelectorTerms field.

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Code Review

This pull request introduces the capability to specify Kubernetes NodeSelectorTerms within the VLLMRuntime custom resource's DeploymentConfig, allowing users to define node affinity rules for their VLLMRuntime deployments. The changes include updating the CRD schema, adding deepcopy logic for the new field, and modifying the controller to apply these NodeSelectorTerms to the generated Kubernetes Deployment's PodSpec. Additionally, several cosmetic changes were made to improve code readability by reformatting function signatures and log messages. A review comment suggests simplifying the NodeAffinity implementation in the controller by directly referencing the NodeSelectorTerms from the VLLMRuntime spec instead of creating an unnecessary shallow copy, as the original object is not modified within the function.