Make dev-ollama model list declarative with configMapGenerator

[dwetmore]

Motivation

• Provide a single source of truth for Ollama models so the model pull job can mount and read /models/models.txt reliably.
• Replace a hand-authored ConfigMap YAML with a declarative generator so adding/removing models updates rendered manifests automatically.

Description

• Added overlays/dev-ollama/models.txt containing one model per line with # comments supported.
• Replaced the hand-written ollama-models ConfigMap in overlays/dev-ollama with a configMapGenerator in overlays/dev-ollama/kustomization.yaml using files: - models.txt=models.txt so the generated key is exactly models.txt.
• Set generatorOptions.disableNameSuffixHash: true to keep the generated ConfigMap named ollama-models for mount compatibility.
• Removed the now-redundant overlays/dev-ollama/ollama-models-configmap.yaml resource reference.

Testing

• Installed kustomize and ran /tmp/kustomize-bin/kustomize build overlays/dev-ollama and grepped for name: ollama-models, which succeeded.
• Verified that appending a newline model to overlays/dev-ollama/models.txt changes the rendered output by comparing SHA256 checksums before/after, which returned a changed result.
• Confirmed the generated ConfigMap contains the models.txt key and that the existing pull job still mounts the ollama-models ConfigMap at /models/models.txt (render validation succeeded).

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Codex Task