Updates APIs Based on Kubernetes API Conventions

[danehans]

Implements the following changes based on Kubernetes API conventions:

• Renames targetPortNumber to targetPort to provide naming consistency with Gateway API and Kubernetes API conventions.
• Moves InferenceModel, InferenceModelList InferencePool, and InferencePoolList definitions to the top of the files.
• Makes inferencemodel.spec.modelName a required field.
• Updates the minimum value of targetPortNumber to be consistent with Gateway API and Kubernetes API types.
• Runs code generators to regenerate DeepCopy functions, CRD manifests, etc.
• Updates examples based on previous API changes and changes introduced by this PR.

[robscott]

For the record, the rest of this PR LGTM, thanks for all the great work on this @danehans!

[robscott]

Thanks @danehans!

/lgtm

[ahg-g]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahg-g, danehans, robscott

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