Spring-ai Update Ollama APIs and fix multimodality test

• Add doneReason to ChatResponse and update OllamaChatModel accordingly
• Add missing descriptions to Ollama options
• Consolidate Ollama Testcontainers image setup
• Fix multimodality Ollama test

Comment From: tzolov

Thanks @ThomasVitale . Made few small adjustments and it is ready to go.

Comment From: tzolov

Rebased and merged at 78cd3e9ad436016627b3a60f03c990ecb1be63ac