Request: Ollama API Key return to Bring Your Own Model

### Describe the feature or problem you'd like to solve

Add Ollama apiKeyEnv API Key to Github Copilot Bring Your Own Model Menu

### Proposed solution

I have a local Ollama server that I want to use remotely and need the API Key to set the host header.

Otherwise, I will need to use a forward proxy server to add the header back and it seems like a wasted effort.

I am using my other API key endpoints

### Example prompts or workflows

This allows me to use my 38GB to 80GB models without token costs or high electricity costs

### Additional context

Comece pelo menu “Bring Your Own Model” e rastreie como as variáveis de ambiente de API key são representadas para outros endpoints. Verifique como o Ollama host header é configurado e, em seguida, confirme que selecionar Ollama aceita e encaminha a API key solicitada sem exigir um proxy.

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