Added generator for OpenRouter.ai

[pedramamini]

Addresses the feature request for adding an OpenRouter.ai compatible generator. Which is compatible with OpenAI. Related issue:

#692

Verification

List the steps needed to make sure this thing works

$ python3 -m garak --model_type openrouter --model_name anthropic/claude-3.5-sonnet --probes encoding
garak LLM vulnerability scanner v0.10.1.post1 ( https://github.com/NVIDIA/garak ) at 2024-12-24T00:31:33.473234
📜 logging to /Users/pedram/.local/share/garak/garak.log
🦜 loading generator: OpenRouter: anthropic/claude-3.5-sonnet
📜 reporting to /Users/pedram/.local/share/garak/garak_runs/garak.ebdebda1-5db4-43f5-a128-826b46f3cd70.report.jsonl
🕵️  queue of probes: encoding.InjectAscii85, encoding.InjectBase16, encoding.InjectBase2048, encoding.InjectBase32, encoding.InjectBase64, encoding.InjectBraille, encoding.InjectEcoji, encoding.InjectHex, encoding.InjectMorse, encoding.InjectNato, encoding.InjectROT13, encoding.InjectUU, encoding.InjectZalgo
probes.encoding.InjectAscii85:  22%|█████████████████▊                                                                | 13/60 

Tests pass.

[github-actions]

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[pedramamini]

I have read the DCO Document and I hereby sign the DCO

[pedramamini]

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