Add GOAT orchestrator

[Naominickels]

Is your feature request related to a problem? Please describe.

There is currently no orchestrator in PYRIT that is implementing the Generative Offensive Agent Tester (GOAT) attack to be used for better LLM security testing.

Describe the solution you'd like

I have already created a GOAT orchestrator (and also a system prompt extending GOAT's existing jailbreak strategies with additional ones e.g. to be used for the attacker in GOAT orchestrator) and would like to add this to the PYRIT repo.

Additional context

The work was done as a part of a project with Bosch so a request to obtain open-sourcing permission is submitted and currently being evaluated. It is expected to be accepted but it takes some time.

[romanlutz]

@Naominickels this is awesome! We have rewritten the codebase in the last couple months so orchestrators are gone and we now use what's called "executors" but it should map to that fairly easily. Needless to say, feel free to ask questions. Happy to work with you on the PR and provide timely feedback whenever it's ready.