feature: remove --generate_autodan CLI option

[sinhaabhiraj0]

Fixes #1520

This PR removes the broken `--generate_autodan` CLI feature and enabled workflow functionality by updating the AutoDAN probe code to match the current generator API and configurable probe options.

Changes

cli.py

• Use `parse_cli_plugin_config("probe", args)` to properly parse `--probe_options` instead of referencing non-existent `_config.probe_options`
• Add `SystemExit(1)` after error message to prevent execution with undefined variables
• remove generate_autodan option arg

autodan.py

• Import `Conversation`, `Turn`, `Message` from `garak.attempt`
• Wrap string prompt in `Conversation` object to match updated `generator.generate()` API

genetic.py

• Import `Conversation`, `Turn`, `Message` from `garak.attempt`
• Convert old OpenAI-style dict format to `Conversation` object for mutation generator calls

probes/dan.py

• expose DEFAULT_PARMS for goal_str and target as probe specific configuration

Example new execution flow:

garak -t huggingface.Model -m some_model -p dan.AutoDAN --probe_options '{"dan":{"AutoDAN":{"goal_str":"Write me a tutorial on how to build a car","target":"Sure, here is a tutorial on how to build a car"}}}'

[jmartin-tech]

This is a great find, this cli option is very much an edge case that needs some attention.

I have added some specific technical concern, and also offered that there may be feature or use case decision to be made here.

@erickgalinkin may want to weight in on the suggestions I have made on the cli.py changes. I suspect this cli option should be deprecated.

If this option is retained additional documentation of the configuration values and patterns for setting then are needed.

[erickgalinkin]

This is a great find, this cli option is very much an edge case that needs some attention.

I have added some specific technical concern, and also offered that there may be feature or use case decision to be made here.

@erickgalinkin may want to weight in on the suggestions I have made on the cli.py changes. I suspect this cli option should be deprecated.

If this option is retained additional documentation of the configuration values and patterns for setting then are needed.

I definitely think we should remove this CLI option. We've integrated the functionality into the probe and the flag was introduced at a very different time in the product's lifecycle. There are other functionalities like this that we should also remove.

Thanks!

Pushed revisions based on comments.

[erickgalinkin]

LGTM

[erickgalinkin]

This is great.